450Bushmaster.net

According to QuickLoad, AA5744 is a tad slow for 250gr bullets. For the same 80% case fill, you are giving up 200fps as opposed to an 80% fill of Lil Gun and you'll be blowing 10% of the AA5744 out the muzzle unburned. The good news is an 85% fill will bring you up to the Lil Gun velocity and not be pushing the pressure limit unlike Lil Gun, which would be over pressure (SAAMI) at 85% case fill.

According to QuickLoad, start with 37gr of AA5744 with those 250 XTP's seated to yield a COL of 2.15 and work up, watching for an accuracy node.

Hoot

Are you still looking for load data for 5744?

c_franklin50 wrote:Are you still looking for load data for 5744?

Please post it if you have some. I have enough 5744 and 250xtp to wear out a few guns.

Any news?