i'm new to the forum and love the info everyone gives. i have shoot this gun (7mm300wby)since 1995 and love it it shots 1/2 groups at 300yds with nosler ab 140's. i was trying something new and wanted to use berger 140s but they keep tumbling at 100 yds has anybody had this problem. i shoot the ab at 3790 over a chrony at 50ft.the berger are a little faster at 3850. all presure is fine on both loads. the gun has a 28in douglas imp.1-9 twist, gentry muzzelbrake, a rem 700 action is free bored put on a axiom stock with alum. pillow bed and topped with a nikon monarch 8-32- 50mm.