Hi there!
I have a 300s universal from 1978, wich when i bought it was producing 7 joule, so i bought a maccari spring, sealing ring and the buffer,replaced them but i did not replace the sealing on the piston, cause it looked ok and was in one piece,but today i took here out for some shooting, and only delivered 8 joule, wich was disapointing, still as accurate, out to 25 meters it's a one hole group, should i take here apart and replace the sealing, or just let it be? I mean it's not going to be a 100 m gun, just gonna shoot between 10-30 m, but is it better for the gun to do it? Or do you think it something else i should replace or do?
I have a 300s universal from 1978, wich when i bought it was producing 7 joule, so i bought a maccari spring, sealing ring and the buffer,replaced them but i did not replace the sealing on the piston, cause it looked ok and was in one piece,but today i took here out for some shooting, and only delivered 8 joule, wich was disapointing, still as accurate, out to 25 meters it's a one hole group, should i take here apart and replace the sealing, or just let it be? I mean it's not going to be a 100 m gun, just gonna shoot between 10-30 m, but is it better for the gun to do it? Or do you think it something else i should replace or do?
You can add a washer behind the spring that'll speed it up but make sure that spring isn't bottomed out ( if it is it'll bind at end of Cocking stroke ) I just picked up a couple from a local hardware store. Just take the rear spring guide inside with you and find one that'll work .. I had one rifle a while back i was restoring that was shooting an honest 750 fps . I took the spring out of it an tried it in my gun and nothing ....Some just shoot faster . By the 4 or 5 most accurate ones I've personally worked on were never the really fast ones .
