Thread: Info on .270 load data using Hodgdon Superperformance powder and 130gr projectiles

Greetings @Dawg,
I note that Hodgdons has a max of 54.3 grains of AR2209 for 3,012 fps at 50,500 CUP in a 24" barrel. Your 18" barrel would lose 25fps maybe 30 fps per inch or 150 fps to 180 fps total or about 2,800 to 2,850 fps expected velocity in your barrel, not 2,670 fps. Hodgdon lists 55.5 grains of H4350 with the harder Barnes for 3,111 fps at 63,500 PSI (CUP and PSI are not the same) so it looks as if the 54.3 grain load is a soft one and the batch of powder you have is a slow one. I assume that your AR2209 is in a plastic canister rather than the earlier metal can and also that the container was still sealed when you got it. If it wasn't sealed then it could be anything.
Based on the load data your AR2209 is slow so a test you could do is to scrounge some AR2209 from another handloader and test this for velocity using the same charge. You could also test an extra grain ie 55.5 grains of AR2209 and 60 grains of AR2213SC which should give an extra 50 fps in each. You could also test the same load in your rifle and another .270 adjusting for your barrel length as above. This will tell you if you have a slow barrel. Please feel free to PM me any results or questions for comment.
Regards Grandpamac.