20 Tac

[tim simbari]

This may sound dumb but I've seen case dimensions ginen for OAL as 1.760" and 1.766", which is it?

[tbeasley]

hey tim
I use trim to length of 1.760.
load that works great, 24.6 RL 10x with the 40gr. VMAX
25.3gr of RL 10x with the 33gr VMAX

[Chuck Miller]

The 1.760 dimm is pretty common, never heard of 1.766. Measured my chamber and it's 1.788, 20-30 thou longer than spec which is pretty common.

[tim simbari]

tbeasley, I'm runnin 25.7 R10x with the 40 vmax in the new Dakota/lapua brass. Shoots great, thanks.

[Alex]

... with the 10x reloads?

Alex

[tim simbari]

I'm getting 3925fps, although this is out of a 25 1/4" bbl in a Dakota Predetor. Slightly better than my N133 loads and groups have been great-just small round holes.

[tbeasley]

25.3 of RL10x with the 40vmax would through my pressures out of the roof.
I chrono'd my load of 24.6 RL10x with the 40vmax and got an avg. of 4020fps.
28" Pac-Nor Barrel 1-12 twist

[DittoHead]

Hodgdon’s 2006 Annual Manual has a trim length of 1.750” for the .20 Tactical using Winchester cases.

[Tom Bellott]

Did you get the package?

[tim simbari]

Got 'em and thanks. Seperated the G&H, annealed, cleaned,loaded it. Nice surprise to see a couple cases headstamped R2.