7mm 190gr A tip

[rardoin]

I’m not running then in a Fclass rifle. But I’m sure the load I’m running is likely beyond the node you are running for Fclass... no poofs. From a 5R 8 twist. I have ran them in load testing a few times without stopping. 30-35 rounds each time continuous firing. From 2900-3045.

I’m not running them that fast. 8.25tw 5R

 

[davidjoe]

I’m going to load up the heavy version (.338) and see if I can get some of that big bullet/big case consistency going this week. Guys are getting that with 30’s. I have these bullets in 190’s, 250’s and 300’s looking for the magic elixir. I’ve been tentative about pushing the 190’s wanting to see how the jackets worked for others.

 

[davidjoe]

Robin, I may, stressing may have found an A-Tip load I’ll run with. So much flatter shooting with a big jump. .338 300 grain. Another caliber would not have stayed in this disk with a constant hold, which is very encouraging.

 

[No i deer]

Any updates on how the 7mm 190gr A tips are shooting..??

 

[rardoin]

Any updates on how the 7mm 190gr A tips are shooting..??

I know nuthiiiiinnng!

STRUDEL!!!! Did anyone say STRUDEL???

 

[davidjoe]

No I, the 7mm ATIPS haven’t been reported to blow up, well, perhaps once, jokingly so. Also by our pioneer, they are now winning LR matches, not the normal way where 9/10’s of the shooters are using them, but where only one is, so far. That is very remarkable in this game.

The jacket was said to be the same thickness as ELDM’s but Hornady says it is a different metallurgical composition. I don’t know of anyone pushing them extremely fast to test that metal, but neither do they seem to need the speed.

Edit, Johnny above, hasn’t blown one in a hot barrel, even at >3,000 FPS.

 

[Fuj]

I know nuthiiiiinnng!

STRUDEL!!!! Did anyone say STRUDEL???

More like Blue Berry Cobbler topped with French Vanilla.

So "Schultz", How many grains of that unknown fairy dust
did you finalize for the win ?? And will you go on a hoarding
mission ??

 

[rardoin]

I was forming 7 SS brass for the match so my brass volume has a 3 1/2gr+ capacity change on firing 1 and about .1gr after 2 firings. The charge I used this past weekend will be changed now that I have all my brass formed. That charge is yet to be determined. I know I will likely keep the speed the same or less as it is safe and groups well at distance. These bullets don't need to be hot-rodded to perform; the BC is insanely high.

 

[Titan]

I was forming 7 SS brass for the match so my brass volume has a 3 1/2gr+ capacity change on firing 1 and about .1gr after 2 firings. The charge I used this past weekend will be changed now that I have all my brass formed. That charge is yet to be determined. I know I will likely keep the speed the same or less as it is safe and groups well at distance. These bullets don't need to be hot-rodded to perform; the BC is insanely high.

Hey I have a quick question have you done any A and B comparison on the BC? I justed tested two 25 shot relays at 1000 of the a tips. As well as some 184 berger sighters for comparison. And the bc was about equal to a 184 Berger after being tipped. The 190 a tip was almost 16.5% under the advertised value. As to the accuracy I didn't see anything good regarding vertical.

 

[rardoin]

Hey I have a quick question have you done any A and B comparison on the BC? I justed tested two 25 shot relays at 1000 of the a tips. As well as some 184 berger sighters for comparison. And the bc was about equal to a 184 Berger after being tipped. The 190 a tip was almost 16.5% under the advertised value. As to the accuracy I did see anything good regarding vertical.

Mine are true at 2780-2800 MV and near sealevel. I’m still working on reducing the vertical but I like them. I’ll know how much I really like them after the next three LR matches I am signed up for.

 

[Titan]

Mine are true at 2780-2800 MV and near sealevel. I’m still working on reducing the vertical but I like them. I’ll know how much I really like them after the next three LR matches I am signed up for.

Interesting results thanks for sharing, best of luck in your matches. Out of curiosity what seating depth are you using? I found a jam of .015 was the only thing that produced under .3 inches during short range 100 yard testing and any jump doubled the group size. Today I tested near sea level, I was at 365ft above sea level 85f 45% humidity 29.54 barometric. Muzzle velocity recorded with a lab radar 2776 avg over 2 strings of 25, SD 5.3-6.7 and ES 19-26 for each of the strings. And retained velocity at the target was 1676 fps (advertised would have it around 1836). Which I believe is close to .353 g7 not .422. Now if I throw out the Shot Marker for a measurement of absolute velocity, and just compare it to a tipped 184 shot under the same conditions 2878 muzzle and 1747 on target which is like .348 or around 98.5% of the bc of the atip. So 1.5% more BC of whatever a tipped 184 might be. Vertical of the last 20 of each string was 15 inches top to bottom (not good), I get about 6-8 with the 184s and 10-12 with the 190 bergers over 20 rounds.

 

[rardoin]

From a very light touch I found that around 35 and 70 thou’ off were two areas that shot well. I’m running them around .033-35” OTL. I have an 8.25tw barrel with a .305” range freebore. I think the cartridge may make a difference as I could not get the Berger 190 LRH to shoot well enough to be competitive in a .284 but they shoot very well in the 7 Sherman Short mag. I did not attempt the Atips in the .284.

 

[dskogman]

Interesting results thanks for sharing, best of luck in your matches. Out of curiosity what seating depth are you using? I found a jam of .015 was the only thing that produced under .3 inches during short range 100 yard testing and any jump doubled the group size. Today I tested near sea level, I was at 365ft above sea level 85f 45% humidity 29.54 barometric. Muzzle velocity recorded with a lab radar 2776 avg over 2 strings of 25, SD 5.3-6.7 and ES 19-26 for each of the strings. And retained velocity at the target was 1676 fps (advertised would have it around 1836). Which I believe is close to .353 g7 not .422. Now if I throw out the Shot Marker for a measurement of absolute velocity, and just compare it to a tipped 184 shot under the same conditions 2878 muzzle and 1747 on target which is like .348 or around 98.5% of the bc of the atip. So 1.5% more BC of whatever a tipped 184 might be. Vertical of the last 20 of each string was 15 inches top to bottom (not good), I get about 6-8 with the 184s and 10-12 with the 190 bergers over 20 rounds.

That’s pretty strange. The BC I’ve seen has been much better than a 184. The precision though has been worse. Plus they have a reputation of not making it to the target. YMMV

 

[Titan]

From a very light touch I found that around 35 and 70 thou’ off were two areas that shot well. I’m running them around .033-35” OTL. I have an 8.25tw barrel with a .305” range freebore. I think the cartridge may make a difference as I could not get the Berger 190 LRH to shoot well enough to be competitive in a .284 but they shoot very well in the 7 Sherman Short mag. I did not attempt the Atips in the .284.

The idea of cartridge and throat geometry and effect on accuracy is interesting. Are you running a 1.5 degree lead angle on your throat in the SS mag? That is what I have in this 284 shehane also using a shorter freebore .225.

 

[rardoin]

I don’t have the reamer print but I presume so. It is proprietary information and a have not had it measured on an optical comparator.

 

[kyreloader]

Hey I have a quick question have you done any A and B comparison on the BC? I justed tested two 25 shot relays at 1000 of the a tips. As well as some 184 berger sighters for comparison. And the bc was about equal to a 184 Berger after being tipped. The 190 a tip was almost 16.5% under the advertised value. As to the accuracy I didn't see anything good regarding vertical.

My results with the 190g ATips showed that the published BC was spot on in my 1:8 twist straight .284 Win.

 

[Titan]

My results with the 190g ATips showed that the published BC was spot on in my 1:8 twist straight .284 Win.

Thanks for the input kyreloader. Do you have any data you would like to share as far as test conditions(muzzle velocity, retained at target, altitude, temperature)? I am interested in what others have gathered on this bullet. I was using a 4 groove krieger 1-9 which according to the miller based stability calculator should cost me 4% BC on the 190 a tip(still missing about 12% of the advertised value). What else I found was muzzle velocity was 25fps lower then with the same load and charge weight with the 190 berger, I suspect the diameter of the atip bullet might be slightly less lowering the pressure and velocity but I am not sure.

 

[kyreloader]

The range is at 1200 ft above sea level, temperature was 78 degrees F the day I shot at 1000 yards. Muzzle velocity per Labradar was 2757 fps for this load and Silver Mountain target had my 1000 yard velocity of 1820 fps.

Predicted come-up was 1 click off but still a 10 on the FClass 1000 yard target.

1:8 twist Krieger.

Hope this helps.

 

[Titan]

The range is at 1200 ft above sea level, temperature was 78 degrees F the day I shot at 1000 yards. Muzzle velocity per Labradar was 2757 fps for this load and Silver Mountain target had my 1000 yard velocity of 1820 fps.

Predicted come-up was 1 click off but still a 10 on the FClass 1000 yard target.

1:8 twist Krieger.

Hope this helps.

Thanks for the information I appreciate it, did you record the humidity by any chance? And during that session did you happen to fire another 7mm bullet for comparison?

 

[kyreloader]

Thanks for the information I appreciate it, did you record the humidity by any chance? And during that session did you happen to fire another 7mm bullet for comparison?

Humidity is always high in Central Indiana, that day it was 82%.

I fired another 7mm bullet, but from a different rifle. I shoot the 190g Berger LRHT bullet in another rifle with a 1:8.25" twist (Bartlein). Muzzle velocity for that bullet is 2732 fps and Silver Mountain had the velocity at the target of 1777 fps. Again, predicted come-ups based on Berger's published BC was 2 clicks (1/8th MOA) off with me needing additional elevation.