Faster powders can work OK. 16 gr 700-X, Rem compression hull and 209 primer with a CB4100-12-B (Lightning) will push a 7/8 oz load to about 1200 fps with about 6600 psi and 20.5 gr PB will do the same thing with 6000 psi. Go to one oz loads and 15.5 of 700-X will do 1150 fps at 7500 psi while 20 gr of PB will "gitterdone" at 6300 psi. 600 psi difference with 7/8 oz and 1200 psi difference in 1 oz loads. However, most "old gun" shooters will accept 7500 psi as a pasable pressure. I use 700-X for 7/8 oz and move to PB for heavier loads for old and new guns.
