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.338 calibers

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Unread 02-19-2012, 07:45 PM
Silver Member
Join Date: Aug 2011
Location: Pueblo, CO
Posts: 371
Re: .338 calibers

Just looked at your website and saw you had GREAT prices on brass. After i shoot out my 338-378 wby barrel is it possible to re chamber it to your Titan? It is in the same league as the Wby but brass is 1/2 the cost. Just some food for thought, as i dont think it will be too long before i need to replace the barrel in my stock Mkv Accumark.
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Unread 02-19-2012, 10:31 PM
Silver Member
Join Date: Nov 2011
Location: Tucson AZ
Posts: 237
Re: .338 calibers

kcopph ,,,,,,,

not a problem, the big Lazz case will fit into your existing bolt-face and cycle/extract just fine ,,,,,,

I believe the big Lazz cases will also feed thru your WBY mag box without issues ,,,,,

just make sure that you start with a new barrel ,,,,,,
John Lazzeroni
Lazzeroni Arms Co
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Unread 02-19-2012, 11:54 PM
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Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,848
Re: .338 calibers

I could not agree more with Johns comments about loading your ammo to hot. I know when I developed loads in the 338 ALLEN XPRESS, it was nearly impossible to develope save, known loads using the Lapua brand brass. As such, I had to go a different route to test my ammunition.

Knowing that the 338 Lapua and the 338 Edge have nearly identical case capacity (generally within 1-2 grains of each other) it was easy to use the Remington brass as a standard. Its a known fact that 300 RUM brass will start to have loosened primer pockets with loads much over 65,000 psi. At this level you will generally get 4 firings before the cases need to be retired.

The 338 Lapua brass made by Norma is MUCH softer then the Lapua brand brass. In fact, when shooting over a chronograph, the 338 Lapua made by Norma will start to loosen primer pockets nearly at the identical velocity as a 338 Edge rifle shooting same bullet weight in same barrel length. This told me that the Norma brass would start to loosen primer pockets right at the same 65,000 psi range.


Well, this gave me a means to test all of my loads for my wildcats based on the 338 Lapua case. I developed loads for every one of them (277 AM, 7mm AM, 300 AX, 338 AX and 375 AX) using Norma brass and would develope loads working up until case head expansion and primer pocket fit would allow 4 firings per case. Again, telling me that the loads were all producing chamber pressures in the 65 to 68,000 psi range which is right at the top working pressures for modern magnum chamberings.

Now, commerical companies can not load their factory ammo to this same level because they can not test every rifle with this ammo and prove every one is safe so they have to download their ammo with a margin of safety.

As mentioned , I do not have to do that because I do test every rifle and prove its safe.

Now using the Lapua brass, you will, or should NEVER get close to loosening the primer pockets and that is why I ALWAYS give my customers a go to velocity and that they should never go over that. This is because I have tested their rifles to this velocity level and proven them safe to be working in the known 65 to 68,000 psi.

NEVER load your ammo over the recommended velocity range given to you by the rifle manufacturer and if you see pressure signs earlier, stop and contact the maker. Loading any ammo to over 70,000 psi is crazy as powder detonation will occur close after this and that is when things get really serious with large capacity magnums.

Do not overload your ammo, be safe. If you want more velocity, go with a bigger engine!!!
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

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Unread 06-04-2012, 05:29 AM
Gold Member
Join Date: May 2004
Location: Alaska
Posts: 994
Re: .338 calibers


I have a Sako TRGS M995 that was originally a 7.82 Warbird that I am considering to have you rebarrel with your 338 AX , I have a new 338 Brux 9.5 twist 30" bbl for it, my question is ....
Will it work with the 300 grain Accubonds and my max OAL of 3.700" that is allowed by the detachable magazine... inside length of the mags is 3.756" and I've used the 3.700" max oal for all my 200 gr 30 cal Accubond loads in the Warbird that fed without any problems. I know it will work flawlessly with the 250 gr and lighter bullets but I've accumulated 600 of the 300 gr Accubonds and they are my go to bullet for hunting moose and bear from 10 yards and out to 1k
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