.25 Cal (Quarter Bore) / Big Game Success - 25 Creed, 25-284, 25-06, 25 PRC, 25 SAUM

[B23]

Here is the 25-06AI load data provided by Berger for the 133/135 bullets. The barrel was 26” and the AI has more capacity than the standard 25-06.

The AI version definitely has a little more boiler room but with the QL model Berger used in that load data they're using a pretty shot 3.250 COAL which eats up quite a bit of that case capacity advantage the AI has over the standard so when I run the same 3.250 through a standard 25-06 at the same pressure same barrel length per QL there was less then 50fps difference.

In a 22in tube with their 135's 3.250 OAL and 59.7gr Magpro which per QL is 59,951psi 2927 fps.

Standard 25-06 same chamber PSI, powder, 135 OAL 3.250, barrel length, 2894 fps.

To your point the long 25-06 maybe isn't the best choice in a Tikka because QL projects a 25-284 with same bullet, same chamber PSI and same 22in barrel it shows 3000fps

 

[DuckDogDr]

Tagging in . Hopefully I can contribute soon

 

[B23]

That 270 WSM # sounds awful high, i'm pretty sure 7 WSM which was a bigger case were more around 81-82 grain h20?

I randomly grabbed a handful of ADG 270 WSM pieces of brass from the four boxes I had delivered the other day and new unfired they hold 79.5gr H2O. Average empty cases weighed 225.6gr I was going to measure the neck thickness but forgot. I'll try and remember to get that tomorrow.

I talked to ADG last week about their 270 WSM case capacity and the guy said it was a foul up on their end and I see they've already changed it.