I have a disrovery I added the O rings an got 20 or so shots from 2000psi down to 1800psi I think total shots count is about 45 or so.think I placed 2 O rings the third one made it not in inguage the valve pin.also with 2 rings I can still increase hammer spring tension.hope this helps
Just a few crows I took while deer hunting yesterday morning,it was a slow morning.shot 5 only recovered 3.top picture is for yesterday and the bottom is form a week ago.
My discovery likes the JSB jumbo heavy 18.13gr and my .25cal marauder likes the JSBs in a 25.39gr.im getting nickle size groups from the discovery at 30yds and quarter size out of the marauder at 50yds hope this helps.
The BM is not a bad air rifle for the money I just got one in Phoenix @ Air Guns Of Arizona they have the 25cal for 469$ and the 22 cal for 439$.they have the best price around for that model.but what every brand you chose you will enjoy the hunting with an air rifle. happy hunting