Hi all! I finally, after about 2 years of ownership, shot a full string over the chrony from my BSA R-10. Here are the unfiltered results, shot with JSB 18.13 grain domed pellets. I'm pretty impressed to say the least and the chrony only confirms what I've thought for a while. This is a super consistent gun. Maybe I'm one of the lucky ones but I still am not sure what the motivation is for some to replace the factory regulator with an aftermarket one. Maybe it's just because I've put so much lead through it that the regulator has had plenty of time to "bed in". This gun never ceases to impress and while I own or have owned several other more expensive PCP's, this one will likely never leave the stable. It's performance is on par with guns costing twice as much IMHO.
Here is the entire 50 shot string after filling the gun to just under 250 on the pressure gauge. With all 50 shots the results were:
High 842
Low 817
Average 835
Ex spread 25
Stan Dev 4
Not too bad!!

If we remove the first two shots and the last 5 and take a look at the 43 shots in between, what I guess you could call the "sweet spot", the results are as follows:
High 842
Low 833
Average 837
Ex spread 9!
Stan Dev 2!
Holy moses! That sure is a purdy shot string! haha

Here is a pic of the gauge just so you can see where I stopped shooting. I took the picture because as you can see there are no real good indicators to be able to tell you what pressure I had shot down to. I actually shot more than 50 shots, maybe 55ish, but I deleted the last 5 shots because I was clearly off the regulator at that point. Anyway, if you're interested, it's right about here on the gauge that you'll want to refill.

I was also shooting for groups at 50 yards over the chrony this morning so here is a cherry picked 5 shot group. This was the second group I shot and was the best of the bunch. There were a couple others that were basically one ragged hole also. It was slightly breezy conditions this morning so while the rest of the groups averaged right around 1/2" to 3/4", I don't think they're worth showing because I know the gun does better in calm conditions. The largest groups were about 1" to 1 1/4" but again, slightly breezy, or at least that's the story I'm sticking to ;-)

A couple pics of the gun after shooting this morning.


Here is the entire 50 shot string after filling the gun to just under 250 on the pressure gauge. With all 50 shots the results were:
High 842
Low 817
Average 835
Ex spread 25
Stan Dev 4
Not too bad!!

If we remove the first two shots and the last 5 and take a look at the 43 shots in between, what I guess you could call the "sweet spot", the results are as follows:
High 842
Low 833
Average 837
Ex spread 9!
Stan Dev 2!
Holy moses! That sure is a purdy shot string! haha

Here is a pic of the gauge just so you can see where I stopped shooting. I took the picture because as you can see there are no real good indicators to be able to tell you what pressure I had shot down to. I actually shot more than 50 shots, maybe 55ish, but I deleted the last 5 shots because I was clearly off the regulator at that point. Anyway, if you're interested, it's right about here on the gauge that you'll want to refill.

I was also shooting for groups at 50 yards over the chrony this morning so here is a cherry picked 5 shot group. This was the second group I shot and was the best of the bunch. There were a couple others that were basically one ragged hole also. It was slightly breezy conditions this morning so while the rest of the groups averaged right around 1/2" to 3/4", I don't think they're worth showing because I know the gun does better in calm conditions. The largest groups were about 1" to 1 1/4" but again, slightly breezy, or at least that's the story I'm sticking to ;-)

A couple pics of the gun after shooting this morning.

