Shot last Sunday at my club in a 50 metre/55 yards rimfire benchrest practice day using sand bags front and rear, no machine rest.
First my five shot sighter group :
Then the 20 shot target. I chose not to adjust the sight but to hold off. Got caught with head and tail wind changes in shots 3 and 4 and 16 and 17. The 10 ring is the smallest thick black ring. The fine inner ring is the "X" ring for count backs.
Score was 48, 48, 50, 48 for 194/200 and 5 "X"s
The BSA was shooting .22 JSB heavies of 18.1 gr at 965 fps, which has an interesting side note. This barrel is hammer forged, very smooth and has a fractional taper from breech to muzzle that can be discerned with a tight cloth pull-through. Unlike many barrels the bc of these and the lighter 15.9 gr JSBs does not seem to deteriorate as velocity goes higher than 900 fps. At high power, even to 1020 fps with the 15.9 gr pellets the bc seems to at least stay as good or even improve. My surmise is that at the higher powers the pellet skirt, being blown out to a more bell shape profile, perhaps reduces drag and turbulence. Nothing extravagent but perhaps enough to favour bc and stability.
This is a tight barrel and at the muzzle is close to .216". In the past I have reported its bc (edit, with its other barrel a .25 but .243" at muzzle) to be better than that from my super accurate FX Royal Elite ST barrel when measured over 100 yatds from the same muzzle velocity.
Here is what it can do in the backyard 25 yards range on the Saturday: Five shots with the lighter 15.9 gr JSB with power turned down 8 turns of the HS adjustment to 930 fps for this pellet.
Hope you find some interest in this rifle's performance being as I've had it some ten years. Kind regards, Harry Yrrah.
First my five shot sighter group :
Then the 20 shot target. I chose not to adjust the sight but to hold off. Got caught with head and tail wind changes in shots 3 and 4 and 16 and 17. The 10 ring is the smallest thick black ring. The fine inner ring is the "X" ring for count backs.
Score was 48, 48, 50, 48 for 194/200 and 5 "X"s
The BSA was shooting .22 JSB heavies of 18.1 gr at 965 fps, which has an interesting side note. This barrel is hammer forged, very smooth and has a fractional taper from breech to muzzle that can be discerned with a tight cloth pull-through. Unlike many barrels the bc of these and the lighter 15.9 gr JSBs does not seem to deteriorate as velocity goes higher than 900 fps. At high power, even to 1020 fps with the 15.9 gr pellets the bc seems to at least stay as good or even improve. My surmise is that at the higher powers the pellet skirt, being blown out to a more bell shape profile, perhaps reduces drag and turbulence. Nothing extravagent but perhaps enough to favour bc and stability.
This is a tight barrel and at the muzzle is close to .216". In the past I have reported its bc (edit, with its other barrel a .25 but .243" at muzzle) to be better than that from my super accurate FX Royal Elite ST barrel when measured over 100 yatds from the same muzzle velocity.
Here is what it can do in the backyard 25 yards range on the Saturday: Five shots with the lighter 15.9 gr JSB with power turned down 8 turns of the HS adjustment to 930 fps for this pellet.
Hope you find some interest in this rifle's performance being as I've had it some ten years. Kind regards, Harry Yrrah.
