Gary,
Stay alert if using 0.177 JSB RS 7.33 gr pellets. I’ve had them fall out when closing the breech on my R7, LGV and HW50.
I’m getting .25” R7 peep sight groups at 10 to 15 yards with JSB 8.44 gr (my vision limits me with a peep). They fit in my breech a little better. Out of the pellets that I have tried, HNs fit all four of my .177 break-barrels tighter than JSBs.