I must be doing something wrong as I very seldom have a problem loading a 1377 or 2240.
I point the muzzle up as I load. The pellet slides back and the skirt catches on the bolt. Then just shove the bolt closed and there ya go. Round chambered. Even .177 wadcutters slide right in without a hitch.
Now if'n yer tossin' the pellet in sideways or somethin', all bets are off!
