6mm BR seating question.

[Ishootforfun]

Hey guys,

I can't find any place on the internet that tells me how much I can jump my Berger 105gr Hybrid Target bullets. Not that it matters but I use Lapua Brass and shoot Benchrest.

Please share your personal experiences with me. I've read articles that say you can jump the bullets pass .070 and get great results, (depending on your rifle). But is it safe is one of my questions.

Ishootforfun

 

[Bill Norris]

The bullets can be safely jumped that far for sure if your chamber is designed as such. But your rifle will tell you where it wants the bullets seated if you do the seating test by starting at a given distance from the lands that you feel comfortable with and seating the bullet out .003 at a time for several increments. The sine wave created by that movement of barrel vibrations will duplicate about every .006 to .009.

This is a practice I use successfuly

(1) Find touch lands measurement with CBTO method
(2) Seat @ .010 to .015 deeper off lands
(3) Load 3 rds. @ .003 deeper in steps moving away from lands until 2 consecutive tight groups show up (NOT ONE)
(4) Seat @ longest measured seating depth of
those (2) groups for CBTO length
(5) For periodic land wear check, load 3 rds. at .003
longer than the measurement in step 4. If the group
is tight this will be the NEW seating depth. If not then stay with the measurement established in step 4

 

[Lone Hunter]

Hey guys,

I can't find any place on the internet that tells me how much I can jump my Berger 105gr Hybrid Target bullets. Not that it matters but I use Lapua Brass and shoot Benchrest.

Please share your personal experiences with me. I've read articles that say you can jump the bullets pass .070 and get great results, (depending on your rifle). But is it safe is one of my questions.

Ishootforfun

How to Load a Hybrid Bullet

Berger Hybrid Bullets were designed to be easy to load and tune to your rifle. Follow these simple steps to get started.

bergerbullets.com

Might want to check what these guys say about seating your bullets.
Bill gave you some pretty good information too…

 

[sandwarrior]

I'll reiterate what Bill Norris said, "Stay safe. and find what seating depth your rifle likes those bullets. This is a question YOU, like every other shooter will have to find. Fine tuning can't be answered over the internet.

The process of how to find the best depth is a good question, though. Seems different with some rifles, but Bill gives a pretty good rundown on how to do it.

 

[Ishootforfun]

I'll reiterate what Bill Norris said, "Stay safe. and find what seating depth your rifle likes those bullets. This is a question YOU, like every other shooter will have to find. Fine tuning can't be answered over the internet.

The process of how to find the best depth is a good question, though. Seems different with some rifles, but Bill gives a pretty good rundown on how to do it.

Thank you for your feedback.

 

[Ishootforfun]

The bullets can be safely jumped that far for sure if your chamber is designed as such. But your rifle will tell you where it wants the bullets seated if you do the seating test by starting at a given distance from the lands that you feel comfortable with and seating the bullet out .003 at a time for several increments. The sine wave created by that movement of barrel vibrations will duplicate about every .006 to .009.

This is a practice I use successfuly

(1) Find touch lands measurement with CBTO method
(2) Seat @ .010 to .015 deeper off lands
(3) Load 3 rds. @ .003 deeper in steps moving away from lands until 2 consecutive tight groups show up (NOT ONE)
(4) Seat @ longest measured seating depth of
those (2) groups for CBTO length
(5) For periodic land wear check, load 3 rds. at .003
longer than the measurement in step 4. If the group
is tight this will be the NEW seating depth. If not then stay with the measurement established in step 4

Hi, Thank you for your feedback.

 

[Ishootforfun]

I'll reiterate what Bill Norris said, "Stay safe. and find what seating depth your rifle likes those bullets. This is a question YOU, like every other shooter will have to find. Fine tuning can't be answered over the internet.

The process of how to find the best depth is a good question, though. Seems different with some rifles, but Bill gives a pretty good rundown on how to do it.

Hi, Thank you for your feedback.

 

[Ishootforfun]

The bullets can be safely jumped that far for sure if your chamber is designed as such. But your rifle will tell you where it wants the bullets seated if you do the seating test by starting at a given distance from the lands that you feel comfortable with and seating the bullet out .003 at a time for several increments. The sine wave created by that movement of barrel vibrations will duplicate about every .006 to .009.

This is a practice I use successfuly

(1) Find touch lands measurement with CBTO method
(2) Seat @ .010 to .015 deeper off lands
(3) Load 3 rds. @ .003 deeper in steps moving away from lands until 2 consecutive tight groups show up (NOT ONE)
(4) Seat @ longest measured seating depth of
those (2) groups for CBTO length
(5) For periodic land wear check, load 3 rds. at .003
longer than the measurement in step 4. If the group
is tight this will be the NEW seating depth. If not then stay with the measurement established in step 4

Thank you for your feedback.

 

[Ishootforfun]

How to Load a Hybrid Bullet

Berger Hybrid Bullets were designed to be easy to load and tune to your rifle. Follow these simple steps to get started.

bergerbullets.com

Might want to check what these guys say about seating your bullets.
Bill gave you some pretty good information too…

Thank you for your response.

 

[JEFFPPC]

Ok, I will be the fly in the ointment. Everything I do is based on one premise. "Is my gun competitive ". For starters I have jumped bullets in 2 barrels out of maybe 35 or so. I start .015 to .020 in the lands then work back into the case like Bill until they shoot repeatable bugholes. But do whatever works for you. I don't chase lands very often. Why waste barrel life if your still competitive. Lots of extra rounds not related to competition is not my cup of tea. 95 % of the time if I feel a need for a tweak, a few 2 shot groups playing with the tuner is all that is required. Maybe I am a "competitor" more than a "shooter". If most guys spent a small portion of the effort they put into their guns learning flags they would be ahead of the game. I am referring this to the short and midrange games. I often wonder how many guys discussing or asking about tuning their rifles do ALL their load developement over flags. I am guessing not a lot. Waste of time, effort , and components.

 

[Bill Norris]

Ok, I will be the fly in the ointment. Everything I do is based on one premise. "Is my gun competitive ". For starters I have jumped bullets in 2 barrels out of maybe 35 or so. I start .015 to .020 in the lands then work back into the case like Bill until they shoot repeatable bugholes. But do whatever works for you. I don't chase lands very often. Why waste barrel life if your still competitive. Lots of extra rounds not related to competition is not my cup of tea. 95 % of the time if I feel a need for a tweak, a few 2 shot groups playing with the tuner is all that is required. Maybe I am a "competitor" more than a "shooter". If most guys spent a small portion of the effort they put into their guns learning flags they would be ahead of the game. I am referring this to the short and midrange games. I often wonder how many guys discussing or asking about tuning their rifles do ALL their load developement over flags. I am guessing not a lot. Waste of time, effort , and components.

Absolutely Jeff. I totally agree with the fact that you start .015 to .020 jam. I do as well with some of my loads but some are just not comfortable with jam. My reason for stating "whatever distance one would feel comfortable with" in my post.

 

[JEFFPPC]

Absolutely Jeff. I totally agree with the fact that you start .015 to .020 jam. I do as well with some of my loads but some are just not comfortable with jam. My reason for stating "whatever distance one would feel comfortable with" in my post.

Bill, I know you and I are usually on the same page, because it works. The only reason I jumped in is because their seems to be push the last couple of years that "The path to accuracy is to jump and the more you jump the better it might be". I think to ignore anything but jumping is foolish. You just might have left left th best choice for a barrel untested.

 

[Bill Norris]

Bill, I know you and I are usually on the same page, because it works. The only reason I jumped in is because their seems to be push the last couple of years that "The path to accuracy is to jump and the more you jump the better it might be". I think to ignore anything but jumping is foolish. You just might have left left th best choice for a barrel untested.

Understand Bro.

 

[wildcatter]

I agree with Jeff and Bill. I am a short range benchrest shooter and coming from the 6ppc and the lighter bullets have always found jam where I ended up with best accuracy, some barrels just over touch to some as much as .015 - .020 jam, but in these slow twist barrels I have never found any 62 to 68 grain bullet to shoot well off the lands.

Saying this the past couple years I have been shooting a few rifles in fast twist 6mm's from 6BR to the 6mm Rem. AI. in all 5 of those barrels with 95 to 108 grain bullets I have still found my best accuracy in the lands, although usually .003 to .010 in.

The one bit of advice I was given by Bart Sauder was to start .000, and never move more than .003" at a time. If you do, there is a good chance you'll miss a perfect depth. Bill and Jeff both gave this same advice, and from what I have seen this is the one constant, no matter if working in, or working out, always go with baby steps and give both in and off the lands the same benefit of the daught.

For me with years of tuning the lighter 6mm bullets always finding my loads in the lands, this where I always start. But make no mistake I always check coming out off the lands to make sure my efforts open up before thinking I have as good as I can get to confirm my loads.

 

[Ishootforfun]

How to Load a Hybrid Bullet

Berger Hybrid Bullets were designed to be easy to load and tune to your rifle. Follow these simple steps to get started.

bergerbullets.com

Might want to check what these guys say about seating your bullets.
Bill gave you some pretty good information too…

That was another helpful response, thank you.