Are comparing fireformed Federal brass to new Lapua brass? Apples to Oranges. Don't get stuck here. Fireworks your brass for maximum results.Here’s what I’ve got. It’s a Savage 308 win. I used Federal gold medal match for the barrel breakin and then worked up a load in the Federal brass that was shooting 1/4 moa with 168 grain Amax and 46 grains of Varget and a 210M primer. I only had about 40 pieces of Federal brass so after it was getting pretty shot out I grabbed a box of Lapua brass. I knew I’d have to tweak the load some but I expected just a small powder charge adjustment because I have done similar with other rifles In the past. Instead though this rifle just shoots like crap with the Lapua brass. 45.8 grains shoots the best at about 3/4”. So you think the brass needs fire formed first to shoot well? I’ve always had good luck with Lapua right out of the box. What are some of your thoughts??
I have not changed anything g else in the load. I just took the 1/4 moa load and put it in the Lapua brass. Same primer. Same bullet. Same seating depth. And the same charge at first. Then I went up to 46.6 grains and 45.5 grains. 45.8 shot around 3/4 moa and below that opened up and above that opened up. It’s got me a little puzzled.
Here’s a pic of how it was shooting with the Federal brass. I know it says 45.8 grains but 46 (like I said above) proved to be the better load after more testing.