gap between the bolt and tophat
i was just wondering what you guys do about the gap between the bolt and top hat when you adjust the top hat, or if you don’t do anything at all. i was just wondering if that would affect consistancy. thank you for your advice
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Say the tophat is 0.310″ and the oring is 0.070″ then I cut the groove for 0.440″ diameter so the oring has like 0.010″ ‘squish’ where on teh other end I cut for ‘on-size’ so the groove is made at 0.450″diameter. That makes a nice slide where it needs to and a more solid fit on the tophat.
Voltar, do you just get a slightly fatter top hat o-ring for a better fit? What did you do to get a ‘good solid’ fit exactly
On a thread I started a ways back, Tony posted saying that he would send any member here free breech O-rings, the good ones, if you send him a self addessed stamped envelope. I think I’ll take him up on that offer… certainly can’t hurt. (Hope the offer still stands Tony!)
On my breech(s) I make the tophat oring a ‘good solid’ fit wheras the fit to the barrel(s) is a very slight drag. The breech gets pulled back into the tophat the same each shot. Never walk about with a cocked gun so the routine is the same once game is spotted anyways.
Gap must vary if you are adjusting the tophat around. Once you settle on a setting a OP would be my reccomendation for sure.
At a minimum do a Loctite fix to the threads.
Good luck
Walter….
You’re right, there is no spring doing that. My bad. However then, could you lube the o-rings so well that there may be almost no friction to help hold the breach to the top hat? I just did a lube job on mine and it slides SO easy I wonder.
Im a bit confused. There is no spring on the breech that holds it agains the top hat. After you cock the gun you just pull the breech all the way back until it sits firmly against the top hat. Some then turn the cocking knob to the side but I dont even do that. I just snug it up and let it sit. The only thing that really holds the breech on the top hat is the Oring in the breech. It creates just enough friction to keep the breech from sliding back off the top hat.
No matter where the top hat is set right? The spring will keep breech up against top hat regardless of top hat setting on stem?
EDIt Not even sure if I asked the question right lol
No Gap. Bolt just slids right up against the top hat as usual.
You shouldn’t have a gap between the breech and top hat. If you’re referring to the front to back movement of the breech when it’s locked over to the left or right, this appears to be normal, and will increase when the top hat is moved inward (closer to the tank). It’s been my experience if the breech is fully seated against the top hat before firing you won’t have any consistency issues. If it’s not, you will. I’ve left the breech knob at the 12 o’clock position without problems. If you load the gun and carry it around for any time (as in hunting) I’d recheck the seat before firing. This seems to be one of the idiosyncrasies of the gun. A possible fix would be to add a sleeve to the breech knob stem to take up the gap once the top hat’s sweet spot is found. This would require precision machining and done on a case by case basis.
Edit: I’m making the assumption the gun is cocked.
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Thanks Voltar, interesting info, although I’m not quite sure I’m up to the task of doing that kind of stuff myself, not at this point anyway. But I’m learning.