Here's my situation

[startrek1761d]

I have a Cooper in 260 Remington, so far it appears that H4350 , BR Primers with the 140 VLD Hunting Berger is what I am looking at. I deer hunt over a 300 acre field and can shoot out to 800 yards. Before you ask I have killed deer out to 542 yards but not with this gun. My problem is if I seat the Berger in the rifling the loaded round will not eject without removing the bolt, I see three options, set the barrel back and have the chamber recut for the bullet, modify the ejector or switch bullets. I don't want to set the barrel back and there is not enough meat on the ejector to back it up .030. that leaves another bullet. am I missing an option, what bullet would you recommend, my twist is 1 in 8 and 140 amax require a 1 in 7.5. Thanks for any ideas you have.

 

[MudRunner2005]

Take it to your smith and have a notch cut out in the front of the action... That would be an option. Personally, I'd call Cooper and see if there was any way you could send it to them, and maybe have them modify it for you?

There is 1 other option that would allow you to seat a bullet all the way to the lands and still be able to eject it, and you wouldn't have to change your barrel, just have the chamber opened up, and the bolt face opened up. You'd have to change out your mag follower for a short-mag follower, but all of this can be achieved for probably $150-200 (parts and smith labor), minus the cost of reloading dies and brass.

Read the whole thread, I think you will be quite intrigued...

http://www.longrangehunting.com/forums/f19/6-5-ss-final-design-109263/

 

[steeltraps]

The 140 a-max doesnt need a 1-7.5 twist. I have shot them out to 1350 yards in a 1-8 twist bartlein chambered in 260. You could just but some cheap remington brass and not worry about ejector marks. Or take to a gunsmith, that has a zero- freebore 260 reamer and have the throat made longer!

 

[gmkempf]

Had the same problem with mine. I shoot 140gr. Amaxs with my c.o.l. at 2.815 and they flat shoot. Was really wanting to shoot those Bergers but after shooting those Amaxs, not looking back.

 

[MudRunner2005]

The 140 a-max doesnt need a 1-7.5 twist. I have shot them out to 1350 yards in a 1-8 twist bartlein chambered in 260. You could just but some cheap remington brass and not worry about ejector marks. Or take to a gunsmith, that has a zero- freebore 260 reamer and have the throat made longer!

You talking about a SAAMI spec reamer, or one with a long freebore like a Weatherby, where it doesn't matter where you seat the bullet, it should shoot pretty good?

I personally don't care for long freebore like the Weatherbys unless it's a small bullet in a big case, like a .257 Wby to help keep pressures down.

 

[startrek1761d]

The 140 a-max doesnt need a 1-7.5 twist. I have shot them out to 1350 yards in a 1-8 twist bartlein chambered in 260. You could just but some cheap remington brass and not worry about ejector marks. Or take to a gunsmith, that has a zero- freebore 260 reamer and have the throat made longer!

On your advice I loaded one round with the 140 amax, at .010 off the rifling they will fit in the magazine, this may work, I will give them a try, thanks

 

[steeltraps]

Mudrunner2005, it can be Sammi spec or anything you want it to be! Zero-free bore reamer mean= your gun smith seats the length of where the bullet touches the reamer. Example = 308= 2.810 oal or 2.910 oal length. Basicly YOU controll your over all length. 260 match PTG . 297 Zero free bore is what i used on my 260. With a 140 vld and a 293 reading bushing it gives me 4 th clearence. I set the oal to 2.920 for my 260 buit on a LA remington

 

[LeddSlinger]

I don't see any problem here except for someone falling victim to false assumptions thrown around the Internet about Berger bullets only shooting good when seated close to the lands or jammed into it.

There is absolutely no reason to seat that bullet into the lands. I have actually shot my very best groups with Berger VLDs seated WAY back off the lands in rifles with magazine lengths restricting seating depth.

If you know how to load test properly and have the powder selection to do it, you can get Berger VLDs to shoot with excellent accuracy at any seating depth. And that's a fact.

 

[gohring3006]

I don't see any problem here except for someone falling victim to false assumptions thrown around the Internet about Berger bullets only shooting good when seated close to the lands or jammed into it.

There is absolutely no reason to seat that bullet into the lands. I have actually shot my very best groups with Berger VLDs seated WAY back off the lands in rifles with magazine lengths restricting seating depth.

If you know how to load test properly and have the powder selection to do it, you can get Berger VLDs to shoot with excellent accuracy at any seating depth. And that's a fact.

my 3006 mag only allows me to load 3.34in would I seat to that length and play with charges or pick a charge and play with seating depth with that being my max length.

 

[MudRunner2005]

my 3006 mag only allows me to load 3.34in would I seat to that length and play with charges or pick a charge and play with seating depth with that being my max length.

I pick a depth and play with powder charge first. Then if I get shifting groups (3 grouping nicely together, then 2 grouping nicely together, but the group of 2 is detached, but near, the first 3), I adjust OAL.

 

[FEENIX]

I don't see any problem here except for someone falling victim to false assumptions thrown around the Internet about Berger bullets only shooting good when seated close to the lands or jammed into it.

There is absolutely no reason to seat that bullet into the lands. I have actually shot my very best groups with Berger VLDs seated WAY back off the lands in rifles with magazine lengths restricting seating depth.

If you know how to load test properly and have the powder selection to do it, you can get Berger VLDs to shoot with excellent accuracy at any seating depth. And that's a fact.

Dang internet!

 

[gohring3006]

I pick a depth and play with powder charge first. Then if I get shifting groups (3 grouping nicely together, then 2 grouping nicely together, but the group of 2 is detached, but near, the first 3), I adjust OAL.

thanks mudd..

 

[MudRunner2005]

thanks mudd..

I should clarify that I shoot 5-shot groups for varification of a load.

So if 3 shots group here, and 2 shots group an inch away, but together...That is a sign of a good velocity node, but that your seating deptch needs adjusting.

That sucks that your magazine is so short. I love that the Remington 700 LA's have such a long mag well. I can seat my 185 VLD's in my .30-06 AI right up in the lands if I want, and still not reach maximum mag length.

Works exactly the same for a 7mm RemMag. That's just another reason why I recommend the 7mmRM over a .300 WM. You can't do that with a .300WM, the case and bullets are too long to seat up into or near the lands without having to have a Wyatt's extended mag box installed by your smith. We've tried it with my buddy's 700 SPS .300WM on several occasions with several different bullets. No-go.

 

[gohring3006]

I should clarify that I shoot 5-shot groups for varification of a load.

So if 3 shots group here, and 2 shots group an inch away, but together...That is a sign of a good velocity node, but that your seating deptch needs adjusting.

That sucks that your magazine is so short. I love that the Remington 700 LA's have such a long mag well. I can seat my 185 VLD's in my .30-06 AI right up in the lands if I want, and still not reach maximum mag length.

Works exactly the same for a 7mm RemMag. That's just another reason why I recommend the 7mmRM over a .300 WM. You can't do that with a .300WM, the case and bullets are too long to seat up into or near the lands without having to have a Wyatt's extended mag box installed by your smith. We've tried it with my buddy's 700 SPS .300WM on several occasions with several different bullets. No-go.

I'm going to try to find a good load at mag length, if I don't, I have decided to just shoot it as a single shot