Nice work BSA, just had a machine shop bud cut the threads on a classic stainless boss M-70 in 338 WM, fired 4 into less than an inch and a half at 200 yards this morning with no wind, 250 A-Frames leaving at 2743 from only 22"s of barrel is plenty good enough for me.
Sounds great.
I'm liking this rifle BSA, it should only tighten up more with a good 11 degree recess from my 'smith.