Gorgeous BDL & a sweet group! Congrats on a fine, fine purchase. Funny...I was scouring GB looking at used BDL's till about 2am last night. Gotta love 'em!
That was by far my best group and it was with federal gold medal match 168 gr. The other groups with other ammo were 1" and up. But- i did shoot all my groups fairly rapidly - about 1-2 minutes per group. That's just how I do it. I didnt have time to let the barrel cool between each shot. I did let it cool about 5 min between groups.