good afternoon;
Caliber is 375 Wby. This rifle gave great accuracy, @1” or less, with cast bullet hardness of BHN 25. Cast bullets now have a BHN number of 11-12. Using same powder charge that gave great accuracy, my groups went to 3”+. Speeds are 1400 & 1650 with two different powders. The only variable are bullets that are not as hard compared to what I was shooting. bullet is a 375449 clone, gas checked.
Normal to loose accuracy with softer cast bullets? Thx for any input
rp