I just got a model 10 predator max1 in 260 on a trade. I also got some speer nitrex grand slam 140 gr. rounds on the trade and I sure hope they are my issue. Anybody ever shot these? They are nickel cased and have a soft lead point. I cant get a group under 1 1/2" at 100 yards. Now I have a 12 LRP in 6.5 Creedmoor that may be spoiling me with small groups, but I expect a little better than this out of my Savage rifles. I am pretty sure this is the rounds causing the issue and I have ordered some dies and I already have the 140 amax I shoot in the Creedmoor. I hope it will alleviate my issue. The speer's shoot minute of deer I guess so they wont go to waste!
Anyone who has shot those rounds how about telling me a little.