What does this mean ...

[GadgetX]

In reference to a Crosman Nitro GP:

Barrel has been crowned and the breech end beveled.

What does this mean?

Mike

[TimmyMac1]

A crown Job is a process of redressing the exit for the pellet at the muzzle end. Beveling the breech is the process of redressing the entrance to the rifling. Pellets can get damaged going in and going out and the processes improve the situation if they are done with care and precision.

TimmyMac1

[GadgetX]

Thanks Timmy.  Does it help groupings?  Is it something I can do or is it a machine shop process?  Again, thanks.  I sure you about tired of answering my questions.

Mike

[Motorhead]

Yes, both can be done by folks with some knowledge and a correct process.

IMO, Breech bevel was most likely ( Knowing those guns ) adding a larger pellet entrance flair into breech so pellet seats a tad deeper and skirt not able to be get clipped/bent upon closing of the action.  Actually a fairly common issue on this family of rifles.

[mtbdrew]

Most definitely they can improve grouping. In my case the beveling cured the crazy fliers I was getting with RWS Super Domes. Before the pellet skirt was getting pinched when the breach was closed, now the pellets always seat uniformly with these pellets.