Seating pellets

My Webly Vulcan required the Pell Pen to seat the pellets into the rifling because the relief in the breach wouldn't hold the pellet allowing the pellet to fall out before closing.

20240607_212416.jpg
 
There's not much volume between the pellet and the breech face. Seating deeper increases that volume a lot. The space behind the pellet is going to affect start pressures and the point your piston recoils on the compressed air in the chamber.

It seems like a sensitive spot to adjust. Gut feeling tells me seating too deep would change the volumes too much and cause problems. As long as a seater got the pellet in there far enough and uniform it would be beneficial. Deeper may not be better.

A stiff pellet seated with a ball would seal up dandy. A skirt expanded too much may cause erratic start pressures. So some pellets may benefit from a seater and some may not. Head diameter, barrel diameter and skirt thickness might change the seating friction and thereby the strategy.

I use my thumb and try to get things uniform as I can. If a guy was serious about it he would test his best pellet with some creatively shaped seating tools that offered a range of depths and skirt expansion. It might make a good pellet better or a cheap pellet best.

...or it might do nothing at all.
 
  • Like
Reactions: .20calguy