Staball 6.5 as good as they say?

[mtnbound]

mtnbound,

I’m a little surprised to hear that. But obviously every barrel is different.

I’ve burnt out a 243Win & 6CM using SB6.5 almost exclusively as the propellant. (A small amount of H1000 in the 243 early on.) Great velocities and accuracy. And now working a new 6GT with very promising early results.

IME, you’ve got to step on the gas to get the best performance out of SB6.5.

42.5gr and 43gr was what I tested and I had 2716fps and 2779fps for averages but had SDs over 70fps in both.

What was your recipe?

 

[hoooogan]

Did one more temp test to grab data with a tighter ES/SD load. Not as amazing as my first test, but still very good numbers. Also snuck in a spicy 127 LRX load (46.0gr) that crested 3k fps but that had slightly sticky bolt on one round.

44.5gr SB 6.5 with 129gr ABLR
- 5 shots warm, 4 shots cold (light primer strike on 5th)
- Zero degrees - 2864.1 AV - 1.6 ES - 0.6 SD
- 75 degrees - 2883.6 AV - 23.5 ES - 9.5 SD

Result: 0.26 fps per degree (got 0.14 last time with bigger ES/SD)

Had a 45.0gr load as well but I called it a day due to increasing light primer strikes. I was getting hot and didn't feel like diagnosing. Have 4 shot warm data, so I'll grab the cold next time.

 

[Wrongside]

42.5gr and 43gr was what I tested and I had 2716fps and 2779fps for averages but had SDs over 70fps in both.

What was your recipe?

6 CM 26” 1/7 JC MTU
42 SB6.5
Alpha LRP cases
Tula LR primer
115 DTAC
COAL 2.87

V- 2930
SD- typically single digit for 5 rounds

I pulled the barrel at ~1300 rounds. It only saw 115DTACs. I’ve only been using the 108ELD in the 6GT so far, but will probably experiment with the 115 eventually.

My targets are 1CM grid, or 0.1MRAD at 100 meters. This was shot at 100M.

 

[Wrongside]

What is your .243 load of choice?


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I don’t have the info for that barrel anymore. Apologies.