510W-12.7X48 load data needed.....

[amafrank]

Looking for some load data for lighter than BMG projos. I've got some cast lead bullets that are .511 dia in the 400-450gr range and want to find some loads both sub and supersonic. Any help is appreciated.

Thanks
Frank

[rumlover]

RE7, between 30-36 grains. I push 750gr pills to 1040 with 34.0 out of a 16"

[amafrank]

Thanks Rumlover,
I'm actually looking for data for much lighter bullets. I've got some good loads for the heaviers ones.

I tried a few different loads on the 450gr lead slugs starting at 26gr of 2400 and found that 28gr of 2400 was pretty accurate and was right at 1300fps. 4227 and N110 worked but seemed to have a more wide open group....


Frank

[rumlover]

Exactly, for the lighter pills, back it down to 30 grains and chrony it. With large bore pills, you really need a slower burning powder for consistency due to the increased bore friction.