I was about to give up on my Nosler M48 in 28 Nosler. The groups were 1.25 at its best. As a last ditch effort I purchased some hammer bullets: 143gr HH, 150gr SH and 155gr HH in their 15 round sample packs. Started with the 143 and did a short ladder test with H1K powder 2gr apart. The first 3...