300 blackout speer 125 gr tnt load.

I'm using the 125 Sierra (2121), 17.9 gr W296, Tula non magnum primers, reformed Remington brass, OAL 2.21".

Feeds great from pmags, locks the bolt back, and I'm seeing sub MOA performance from an 18" Wilson 1/8 barrel. No chrono data though :/

The Sierra load data shows a max load of 18.3 gr with H110.

Thanks. Good stuff.

Quote:

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With the powder disks and the W 296 it has been a challenge to make small increases.

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I have learned to use tape. run tests and find that the disk is a little too much for the load?

You measure by hand test loads then when you find what works the tape on the disks makes it repeatable. [Flower]