Originally Posted by
Hick
BR-5 is a relatively fast pistol powder, so reduced loads are supposedly OK. I have tried it in 30-06, 303 British and 30-30. A magnum primer helps get good ignition, but I have also tried standard primers without any issues. The supplier says that Unique loading data can be used for BR-5, and I have found that to be about right. However, as noted, a magnum primer might be best.
In 30-06 I used BR-5 in the 10-13 grain range with bullets running from 150 - 200 grains and found some accurate loads in the 1000-1500 fps range.
In 303 British I use 12.5 grains behind a 177 grain powder-coated bullet at 1500 fps.
In the 30-30 I use 8 grains with a 170 grain lubed bullet at 1100 fps.