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I fired a few rounds I developed for my 1:8 twist thru my 1:12 twist today, round holes at 50m (and good grouping) so it looks like they are stable. Sounded like they might be supersonic though,...

I have settled on 11.5gr of Trailboss with the Sub-X, gives me 1094fps. 10gr was 949fps, 12gr was 1133fps.

I'm surprised at the difference the projectile makes, 7.5 grains for the 151gr cast...

Loaded a few more Sub-X rounds today from 10 to 12 grains of Trailboss, hopefully it doesn't take me another 6 months to get to the range again!

Finally made it to the range today!
I still have some work to do. The 151gr cast projectiles are just subsonic (1106fps) with 8gr of Trailboss, but the Sub-X 190gr are way slower, 696fps with 8gr,...

Bought in March, loaded in April, none fired yet - s**t I’m slack!

Loaded some up something like two months ago.

Still haven’t been to the range to test them!