||11-11-2011 11:37 AM
Originally Posted by Cuda66
The bullet would be a 147gr. The heavier bullet will spend more time in the bore, and get a more efficient burn behind it.
Not certain which powder, though.
I hear this phrase quite a bit; barrel time. Cuda, a 147gr bullet spends exactly the same time in the bbl as a 115gr bullet if they are both going 900fps. SO yes & no. I have found loading for short or long bbl., there isn't really an optimum bullet or powder. Longer/heavier bullets can stabilize better, but maybe not. If not driven fast enough, they don't stabilize & can be less accuarte. So shorter bbl, less vel, wrong twist rate, poor accuracy.
You always get the highest vel using slower powders, regardless of bbl length. You just get more blast & flash to go with it. SO no easy answer really. Loads that work in my 5" guns run fine in my 3.5" guns. If you want less blast & flash, use a faster powder, but you will also lose vel, if that matters. SOme like TG, it does fit that nich, but I won't use it or other uberfast powders, regardless of bbl length.