6mm br shorten to 6mm ppc capacity

[nakneker]

What a fun thread!

 

[gpoldblue]

Lots of people find a PPC temperamental, especially with n133. Worse? Lol! In a PPC, LT32 seems way, way less temperamental IME. I wonder and suspect it will act the same in his Talldog Improved. Personally, I think most of that is the nature of n133 more so than the cartridge but they both play their part. Oh, and it's just tough to beat a well tuned ppc with n133 but the key is the well tuned part, again IME. FWIW, with light bullets, I mainly use LT32 in a 6 Grendel but have shot a fair amount of n133 as well. If anything, I'd say it's a tad less temperamental in it than a PPC but hard to say. Different days bring different temperament in both. Either way, that's exactly what tuners are for.

That tuner can't change internal ballistics....a tuner can only try to compensate at the muzzle after ignition and burn.

 

[gunsandgunsmithing]

That tuner can't correct internal ballistics....a tuner only acts at the muzzle after ignition and burn.

Sorry if I wasn't clear. The internal ballistics affect the in bore time of the bullet and muzzle position at bullet exit. A tuner does much the same regarding where the muzzle is when the bullet exits. So you're right that a tuner has nothing to do with affecting powder burn but that burn affects exit timing relative to muzzle position. THAT's exactly what a tuner does but instead of speeding or slowing the bullet, a tuner speeds or slows the bbl, maintaining peak tune as in bore time changes. It's not that complicated.

 

[Mark Buettgen]

When I started the Short Range game in 1989, there was no Sako 220 Russian brass available and if you did find some, they were getting 3.00 per case or more so I had Fred Hasecuster build me a Tall Dog on a Panda action.
This was based on the Remington case as there wasn't any Lapua yet and the Remmy case is a bit smaller and with the shoulder pushed back .085", this gave you about a 1/2 grain more capacity than the 6 PPC.
There were 2 different lots of the 7 BR case, one had small lettering and one large, the large head stamped brass was by far better and surprisingly consistent, it just couldn't take the pressures like the Russian stuff could and you just planned on a batch of 20 cases per weekend match.
Skip Otto made a die set with interchangeable buttons that made forming brass a snap and you rarely ever lost a case to folds.
I used that round for about 3 years until Lapua came out with the 220 Russian and then switched back to it simply because it was easier and lasted way longer than the Remington brass.
I never felt I was at a disadvantage with the Tall Dog and won my share of fake wood trophies and neither did Fred Hasecuster who shot his way into the Hall Of Fame with it.
Given the quality of the Lapua 6 BR Norma case, I wouldn't be afraid of redesigning the specs for the larger Norma case and running it again.
Later, Mark Buettgen
Bartlein Barrels Inc.