6.5PRC 156 berger - seating depth OAL/jump

[mauiarcher]

working up a load for tikka t3x 24" with berger 156 and H1000. The SD and ES are great at 58.4grain (12.5 and 5.4 only 3 shots though) but accuracy is not there (1.29"). I started at 2.995 OAL (max for magazine) and lands are around 3.084 so 89thou jump. I have read the bergers like alot of jump. Next range trip I have a few different OAL to try down to 2.955.

What is your preferred OAL or jump? Any one with similar experience?

Thanks

 

[Nine Banger]

I'm loading .020" off and I'm getting the same groups.

I don't get groups much smaller than that when I shoot 10-30 round groups of any ammo.

 

[Yovi1991]

I’m .020 off the lands as well and have had great results never messed with anything deeper. started .020 and had great results

 

[Azhunter10]

I’m running 156s with N565 and a .30thou jump and never messed with it from there as it shot very well

I should mention, I’m running it in a long action with a 20” barrel

 

[JO.]

I'm .45thou off but I'm seated at 3.03 in a medium action. I've shot some of the Berger factory rounds through it and I would imagine they are loaded to 2.995.

 

[mauiarcher]

I'm .45thou off but I'm seated at 3.03 in a medium action. I've shot some of the Berger factory rounds through it and I would imagine they are loaded to 2.995.

I looked on the Berger site and from recollection they may have been 2.955 oal…same as Hornady eldx

 

[Kimber7man]

2.955 is correct

 

[davsco]

Don't you have more room in a tikka - long mag and bolt stop? I'm just starting reloading my tikka with proof barrel. 3.04 coal which is .025 off for me. Haven't tried anything else yet. Definitely too long for a short action Remington/clone. Accuracy is better than some custom ammo, perhaps because mine is longer, or maybe just a more consistent powder charge. 156 bergers.

 

[mauiarcher]

The block in the magazine prohibits me from loaded any longer. I think I could get a different caliber tikka magazine for some additional length.

That said, I kinda gave up with the 156 Berger’s…at least for now until I can get some different powders to try. Getting powder in Hawaii is a total PIA. I ended up going nosler ABLR.

 

[Mtslackcountry]

I run the 6.5 PRC tikka 24" barrel with the long action mag and bolt stop. My load seated .030 off lands : 156 berger 58.5 grains H1000 ADG brass. Fed 210M primer. velocity is 2915FPS. Very accurate! much more so than N565.

 

[RReuter]

I run the 6.5 PRC tikka 24" barrel with the long action mag and bolt stop. My load seated .030 off lands : 156 berger 58.5 grains H1000 ADG brass. Fed 210M primer. velocity is 2915FPS. Very accurate! much more so than N565.

Would you be able to measure what your COAL is and report back? I'm running 58.3 grains of N565 at 1910 fps. I have an ES of 22 fps and an SD of 6 over 25 shots. My groups are anywhere from an inch to an inch an a half not discounting any shots as "flyers". I've always heard if your data is good, play with seating depth.

 

[mauiarcher]

I purchased the long action mags to run long OAL and will eventually get around to testing seating depth closer to lands (3.082) but our range is still closed since the floods in march and I worked up a very accurate ALBR load.

 

[Mtslackcountry]

Would you be able to measure what your COAL is and report back? I'm running 58.3 grains of N565 at 1910 fps. I have an ES of 22 fps and an SD of 6 over 25 shots. My groups are anywhere from an inch to an inch an a half not discounting any shots as "flyers". I've always heard if your data is good, play with seating depth.

3.088 is the Coal on this load. I currently use this load on 2 tikka 6.5 PRC both with 22" factory barrels. The barrels have close to 150 rounds each on them. There avg speeds are 2890 FPS and 2913 FPS non suppressed. Both guns shoot right around 1moa for 10 shot group prone on bipod. smallest 10 shot group is around .7" and larger groups are 1.3". Ive done 5 shot groups out to 600 and they are under MOA. My SD is right around 8- 9 generally. I would like to get that better but I think I would need to start manually weighing my charges and the Charge master isnt all that accurate. I call can pull 3 stick of powder out and have it still weigh the same.

 

[Mike D Texas]

I usually start at .[emoji[emoji[emoji6]][emoji[emoji6]]][emoji[emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6]]]][emoji[emoji[emoji6]][emoji[emoji6]]]” off touch point of the lands. In [emoji[emoji[emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6]]]][emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6][emoji6]]]] magnum cartridges I have not had to move from that spot.

The Berger Hybrids are pretty agnostic on jump and usually tune easily at multiple distances in my experience. The VLD style bullets are much more finicky with jump.


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[RReuter]

I usually start at .[emoji[emoji[emoji6]][emoji[emoji6]]][emoji[emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6]]]][emoji[emoji[emoji6]][emoji[emoji6]]]” off touch point of the lands. In [emoji[emoji[emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6]]]][emoji[emoji6][emoji6]][emoji[emoji[emoji6]][emoji[emoji6][emoji6]]]] magnum cartridges I have not had to move from that spot.

The Berger Hybrids are pretty agnostic on jump and usually tune easily at multiple distances in my experience. The VLD style bullets are much more finicky with jump.


Sent from my iPhone using Tapatalk Pro

Any reason your response is showing up formatted as it is? "Emoji X 100"