I keep a reloading/shooting binder for all my guns with my shot targets and crony results . Just to see how well my Bar did as compared to my other guns here are the results. Note these are my best groups on a good day at the range, I use front and rear sand bags and shoot from a sturdy bench, no gun vise ,targets at 100 yds 3 shot groups.
.223 Rem 700 BDL bolt,with a 6x24 tasco =0.75"
6.5x55 Mod 96 custom mauser bolt with a 3x9 Bushnell = 0.75"
30-30 Marlin 336 lever with a 4x Tasco =1 3/8"
.300 Win m70 bolt with a 4x12 Lepould =0.50"
444 Marlin lever with a 1.5x4.5 Bushnell=0.52"
all above are handloads.
7.62x39 m56 SKS semi with a 4x chinese scope =1.25"
with surpluss ammo.
It appears that my BAR in 30-06 is my best shooting gun at 0.43"
I never really compared.I reload and try to get the best I can out of each gun. I bought my BAR Grade 4 in 1971 and haven't had any problems with it, still shoots great.
The moral is a BAR will shoot as good as any hunting gun out there if you do your part.