Flow Through Bolt Problem...

[rsterne]

Nice that the fabricator is trying to get the maximum diameter so he can get the bigger hole inside.... Compare that to the flow through bolt on a QB and it's a LOT bigger, the QB isn't even close to bore size.... I notice that the center hole in the flow through is so deep that it nearly cut through to the O-ring groove, that's why the bolt failed....

I replaced the flow through on a QB (one that I had drilled out for more flow) with an extended probe instead and picked up 30 fps on a 900 fps gun.... Other than the flow through style seating all pellets to the same depth and square I can't see any reason for using one....

Bob

[sholo]

I replaced the flow through on a QB (one that I had drilled out for more flow) with an extended probe instead and picked up 30 fps on a 900 fps gun.... Other than the flow through style seating all pellets to the same depth and square I can't see any reason for using one....

I remember that post (bookmarked it, actually), which is exactly the reason I'm going to try it out. Not so much on this gun as it is staying Co2, hovering around 550 fps, but more for my 2260 HPA. She only plinks/punches paper with me (she wouldn't shoot an animal if it was gnawing her leg off!), so max fps isn't an issue.

Sean:
I think for now I'll leave the leade as is, other than maybe polish/lightly (very lightly) round off the sharp edge so the pellets aren't nicked when chambered.

Eric:
No worries, bud! I'm not looking for free handouts/replacements (wasn't the intent of the post), just some info - which I now have

I'm still in the learning stages - and probably will be for quite some time yet! When I realized it (bolt) was snug, I could/should have just put it in the drill press (don't have a lathe) and give it a wee touch with some 1000 or 2000 grit paper - now that I know I'm looking for .216" (thanks, Sean!). Would have solved everything quite easily!

Thanks guys,

Todd

[SeanMP]

Sean:
I think for now I'll leave the leade as is, other than maybe polish/lightly (very lightly) round off the sharp edge so the pellets aren't nicked when chambered.

I'm still in the learning stages - and probably will be for quite some time yet! When I realized it (bolt) was snug, I could/should have just put it in the drill press (don't have a lathe) and give it a wee touch with some 1000 or 2000 grit paper - now that I know I'm looking for .216" (thanks, Sean!). Would have solved everything quite easily!

Thanks guys,
Todd

The easy way to smooth that transition is to use a .22 bore mop on a standard cleaning rod. Coat the mop thoroughly with a mild abrasive like white toothpaste or JB Bore or those hard wax based abrasives used for buffing wheels can be softened with mineral spirits to a paste...etc. Then give the throat about 100 strokes. That way your efforts are parallel to the axis of the bore and you'll end up with a tiny bit of a leade.

These barrels dont really have a leade to begin with with. It's more of a throat with a hard transition to boreIMG093.jpg