200g Jacks
- Thread starter paulT
- Start date
Message sent milanuk, cheers.
memilanuk
Gold $$ Contributor
The point was to tag them *here*, so they can respond and everybody can benefit.
XTR
F-TR obssessed shooting junkie
200 Jack is a bullet made by KP Ballistics in Canada. It's a 200gr 308 with a .357 G7.
I can't tell you the specifics of how my chamber is reamed. My smith cut the chamber with a 95 Palma reamer and then throated out a little. Compared to some of the Berger offerings out there I'd put them needing about a .120 freebore. They have a short bearing surface.
If someone has some in hand and wants a reamer specifically for them I'd suggest making up some dummy rounds and sending them to PT&G or JGS and letting them make one up that fits your needs.
I can't tell you the specifics of how my chamber is reamed. My smith cut the chamber with a 95 Palma reamer and then throated out a little. Compared to some of the Berger offerings out there I'd put them needing about a .120 freebore. They have a short bearing surface.
If someone has some in hand and wants a reamer specifically for them I'd suggest making up some dummy rounds and sending them to PT&G or JGS and letting them make one up that fits your needs.
I had my barrel (Bartlein 1:10 HV, if it matters) chambered for the 200 Jack with the bullet 0.185 into the neck, which I think worked out to just a bit over 0.100 freebore. Like Wade my smith used a Palma 95 reamer and went from there. They are remarkably jump tolerant, with people getting good results anywhere from -0.010 to -0.060. I am not aware of anyone having much luck jamming them yet. I've been shooting them for a couple of years now, so am very happy to share what I've learned.
Scott
Scott
Here is a article/interview with Kenny about the 200 Jacks.
https://www.facebook.com/FclassCommunityChannel/posts/908273649337722
Hi F-Class Community I have joining me Kenny P. Founder of KP Ballistics and the creator of the 200 Jacks. Kenny not only make and design and bullets but recently in August 2017 competed as an individual at the 2017 Canadian National Championship F-Class Championship and had great success KP Ballistic Team placing 2nd in the Rutland Cup at the World F-class Championship, 8th in the 2017 Canadian F-class Nation. As an individual he finished 10th in the Canadian National Championship and 13th in the FCWC. There were a few other competitors shooting Kenny’s bullet and 5 of the top 11 shooters in Canada were using the 200 Jack at the F-Class Nations. Congratulations on the impressive results and thank you for providing your time to do this interview.
F-Class Community Ch (FCCC): So Kenny provide a little bit of background on how you got into making and designing bullet?
KP Ballistics: Passionate people sometimes are excessive, I am one of them. When I set my mind to something, I do it with passion until satisfaction is reached. I am a ballistics passionate since many years now, red a lot of technical book, and I had the vision something new could be done. Benchrest custom bullet manufacturer concentrated themselves on mostly very conservative tangent ogive , the bigger manufacturer designer were not taking high risk to reach the maximum potential and some people just lack vision and guts. For sure some monolithic projectile has done very impressive design over the last years, but I was convinced I could push the limit with the match jacketed projectile!
FCCC: What was your goal in designing your first bullet? KP Ballistics: The ultimate F/TR bullet! The higher BC with the maximum manageable recoil. The F/TR competitor choice for weight seem to have stabilize at 200 gr, so I optimized that weight. I was not searching for an easy going and forgiving bullet, I wanted a Formula 1, not a tourist car.
FCCC: So what is the background to the name 200 “Jack”?
KP Ballistics: It would have been easy to name it Low drag something, or something low drag, but I wanted something that has grit. It is my good friend Scott Bissett that suggest I take something from Boxing , knowing i like Boxomg. It came obvious to me that Jack Delaney was a good analogy to the bullet. He was a very talented boxer, but it is because he was often way lighter than his opponent and even won World Championship in these terms. He is still considered by some as one the hardest puncher of all time. The 200 Jack has the same ballistics performance than a 215 Hybrid.
FCCC: What is the bullets BC? Please also describe your 200 Jack and what makes it so unique to the market?
KP Ballistics: The tested B.C. (tested by Applied Ballistics at their lab) is G7 of .357 and a G1 of .698. My approach is bold, it sacrifices bearing surface for a longer ogive. There is a long transition between the bearing and the ogive and a secant ogive. It is trimmed and repointed to have access to this low drag ogive with a special sharp boat tail. I did not apply for a patent, it is nothing new, i just pushed the design to it’s limit, it is bold and efficient and with a benchrest consistency production.
FCCC: Most if not all F-Class competitors and PRS have custom rifles made to shoot a certain bullet, and many will chamber to Freebore ideal to a certain bullet. What ideal Freebore for the 200 Jacks based on a 2.025” SAMMI Case length? How did you come to that number?
KP Ballistics: Recommended freebore is .100 in., my chamber is around .120 in. and I would say it is the max I would suggest.
FCCC: Will it shoot and feed well from a Magazine?
KP Ballistics: I have a customer in Australia that shoots it mag fed in his 300 WM for ELR, but I have to be honest, it would need a really short throat to shoot it mag fed efficiently.
FCCC: Do you need any specialty equipment to reload with this bullet?
KP Ballistics: If you keep in mind the Ogive is really long and if you add the transition length, it is really long before you hit the bearing, so most of standard tool used to measure bullet, like bullet comparator, dies stem, need to be very deep. The tip of the bullet is not as consistent as the ogive so it is not made to take measurement, so I would suggest using VLD stem, or modify your tool to make sure the tip doesn’t touch. FCCC: Now this bullet is not only limited to F-class competitors, PRS competitors, and some ELR application or even the recreational shooting looking for that extra precision.
FCCC: Through your testing and load development process. How would you describe the 200 Jacks as easy to tune or is it jump sensitive? What seating depth have you and your team members found to be accurate? Or will it vary a lot between rifle to rifle?
KP Ballistics: The tuning process is the same as any other bullet and we are multiple competitors that found similar load. They liked to be jumped more than other bullet. Most make them work around .030 or .035 in. jump, even more for some customer. Varget being the most common propellant, it as been very popular, using a Small primer brass, around 45gr of Varget for a popular node at 2675-2690 fps (please start 10% lower and work your way up safely). H4895 has also been used with success. The short bearing surface and relatively soft jacket keep pressure low. If your brass prep is very consistent and your seating is consistent, you should be able to make tight group very fast. You then fine tune for the flattest result at long range.
FCCC: What would you recommend then would be the ideal twist rate for the 200 Jacks?
KP Ballistics: Recommended twist is 1:10 or faster
FCCC: Many of the highest-level competitors sort bullets. Do you think sorting your bullets by length is necessary with the 200 Jack?
KP Ballistics: I can tell you that I am very proud of the measurement consistency of the Jack, and probably that bullet sorting is not necessary, but it is something you can control, so you can do it. I personally don’t, even for the world’s Championship. Base to ogive measurement is VERY tight, but you could sort by overall length to assure they will all have the same meplat size, therefore same drag. But again, it is all to gain confidence.
FCCC: So how do people purchase the 200 Jacks and how can they get in contact with you?
KP Ballistics: My website WWW.KPBALLISTICS.COM has all the dealer contact emails, including mine. I take care of the USA and Canada directly, but I have dealer around the world to serve international customer. The need for an export permit makes it impossible to sell direct everywhere. Australia, U.K., South Africa, Spain, Italy, Ukraine and other’s to come. The easiest way to be inform of any new product is the Facebook page, we have very interesting news coming soon!
FCCC: Conclusion: Kenny Thank You once again for this interview and to my viewers thank you for reading. I hope this provides you some good information about the 200 Jack and hopefully get you jump started into trying out this ultra high BC 308 caliber 200 Jack bullet. Please feel free to provide comments below and if you have questions about the 200 Jack. You could contact KP Ballistic through their Facebook @KPBallistics , page or through their email located at www.kpballistics.com. Remember to keep an eye on the flags and tight groups. (End session)
https://www.facebook.com/FclassCommunityChannel/posts/908273649337722
Hi F-Class Community I have joining me Kenny P. Founder of KP Ballistics and the creator of the 200 Jacks. Kenny not only make and design and bullets but recently in August 2017 competed as an individual at the 2017 Canadian National Championship F-Class Championship and had great success KP Ballistic Team placing 2nd in the Rutland Cup at the World F-class Championship, 8th in the 2017 Canadian F-class Nation. As an individual he finished 10th in the Canadian National Championship and 13th in the FCWC. There were a few other competitors shooting Kenny’s bullet and 5 of the top 11 shooters in Canada were using the 200 Jack at the F-Class Nations. Congratulations on the impressive results and thank you for providing your time to do this interview.
F-Class Community Ch (FCCC): So Kenny provide a little bit of background on how you got into making and designing bullet?
KP Ballistics: Passionate people sometimes are excessive, I am one of them. When I set my mind to something, I do it with passion until satisfaction is reached. I am a ballistics passionate since many years now, red a lot of technical book, and I had the vision something new could be done. Benchrest custom bullet manufacturer concentrated themselves on mostly very conservative tangent ogive , the bigger manufacturer designer were not taking high risk to reach the maximum potential and some people just lack vision and guts. For sure some monolithic projectile has done very impressive design over the last years, but I was convinced I could push the limit with the match jacketed projectile!
FCCC: What was your goal in designing your first bullet? KP Ballistics: The ultimate F/TR bullet! The higher BC with the maximum manageable recoil. The F/TR competitor choice for weight seem to have stabilize at 200 gr, so I optimized that weight. I was not searching for an easy going and forgiving bullet, I wanted a Formula 1, not a tourist car.
FCCC: So what is the background to the name 200 “Jack”?
KP Ballistics: It would have been easy to name it Low drag something, or something low drag, but I wanted something that has grit. It is my good friend Scott Bissett that suggest I take something from Boxing , knowing i like Boxomg. It came obvious to me that Jack Delaney was a good analogy to the bullet. He was a very talented boxer, but it is because he was often way lighter than his opponent and even won World Championship in these terms. He is still considered by some as one the hardest puncher of all time. The 200 Jack has the same ballistics performance than a 215 Hybrid.
FCCC: What is the bullets BC? Please also describe your 200 Jack and what makes it so unique to the market?
KP Ballistics: The tested B.C. (tested by Applied Ballistics at their lab) is G7 of .357 and a G1 of .698. My approach is bold, it sacrifices bearing surface for a longer ogive. There is a long transition between the bearing and the ogive and a secant ogive. It is trimmed and repointed to have access to this low drag ogive with a special sharp boat tail. I did not apply for a patent, it is nothing new, i just pushed the design to it’s limit, it is bold and efficient and with a benchrest consistency production.
FCCC: Most if not all F-Class competitors and PRS have custom rifles made to shoot a certain bullet, and many will chamber to Freebore ideal to a certain bullet. What ideal Freebore for the 200 Jacks based on a 2.025” SAMMI Case length? How did you come to that number?
KP Ballistics: Recommended freebore is .100 in., my chamber is around .120 in. and I would say it is the max I would suggest.
FCCC: Will it shoot and feed well from a Magazine?
KP Ballistics: I have a customer in Australia that shoots it mag fed in his 300 WM for ELR, but I have to be honest, it would need a really short throat to shoot it mag fed efficiently.
FCCC: Do you need any specialty equipment to reload with this bullet?
KP Ballistics: If you keep in mind the Ogive is really long and if you add the transition length, it is really long before you hit the bearing, so most of standard tool used to measure bullet, like bullet comparator, dies stem, need to be very deep. The tip of the bullet is not as consistent as the ogive so it is not made to take measurement, so I would suggest using VLD stem, or modify your tool to make sure the tip doesn’t touch. FCCC: Now this bullet is not only limited to F-class competitors, PRS competitors, and some ELR application or even the recreational shooting looking for that extra precision.
FCCC: Through your testing and load development process. How would you describe the 200 Jacks as easy to tune or is it jump sensitive? What seating depth have you and your team members found to be accurate? Or will it vary a lot between rifle to rifle?
KP Ballistics: The tuning process is the same as any other bullet and we are multiple competitors that found similar load. They liked to be jumped more than other bullet. Most make them work around .030 or .035 in. jump, even more for some customer. Varget being the most common propellant, it as been very popular, using a Small primer brass, around 45gr of Varget for a popular node at 2675-2690 fps (please start 10% lower and work your way up safely). H4895 has also been used with success. The short bearing surface and relatively soft jacket keep pressure low. If your brass prep is very consistent and your seating is consistent, you should be able to make tight group very fast. You then fine tune for the flattest result at long range.
FCCC: What would you recommend then would be the ideal twist rate for the 200 Jacks?
KP Ballistics: Recommended twist is 1:10 or faster
FCCC: Many of the highest-level competitors sort bullets. Do you think sorting your bullets by length is necessary with the 200 Jack?
KP Ballistics: I can tell you that I am very proud of the measurement consistency of the Jack, and probably that bullet sorting is not necessary, but it is something you can control, so you can do it. I personally don’t, even for the world’s Championship. Base to ogive measurement is VERY tight, but you could sort by overall length to assure they will all have the same meplat size, therefore same drag. But again, it is all to gain confidence.
FCCC: So how do people purchase the 200 Jacks and how can they get in contact with you?
KP Ballistics: My website WWW.KPBALLISTICS.COM has all the dealer contact emails, including mine. I take care of the USA and Canada directly, but I have dealer around the world to serve international customer. The need for an export permit makes it impossible to sell direct everywhere. Australia, U.K., South Africa, Spain, Italy, Ukraine and other’s to come. The easiest way to be inform of any new product is the Facebook page, we have very interesting news coming soon!
FCCC: Conclusion: Kenny Thank You once again for this interview and to my viewers thank you for reading. I hope this provides you some good information about the 200 Jack and hopefully get you jump started into trying out this ultra high BC 308 caliber 200 Jack bullet. Please feel free to provide comments below and if you have questions about the 200 Jack. You could contact KP Ballistic through their Facebook @KPBallistics , page or through their email located at www.kpballistics.com. Remember to keep an eye on the flags and tight groups. (End session)
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