Rogue shots ……. help
Hi guys, I could really use some help in solving the cause of random erratic shots. I’m in the process of setting up my CSS and I’m being plagued by rogue shots which is seriously skewing my results. I’m using a TT quick change top hat.
I’ll be in a string that’s looking really good and then I’ll get a shot that is anywhere between 30 and 100fps a drift from those that both proceeded and followed it. This may happen two or three times over the course of thirty to fifty shots. It can happen in as few as ten shots!
I changed from using shims to an O ring with a thickness 1.7mm/0.067” for no real improvement
In a bid to check the fit of the front and rear breech o rings on the barrel, I offered up the breech the wrong way round as well as in the correct orientation. I found that the rear o ring was a much looser fit than the front. There was positive tension as the front o ring slid on but the rear was not such a good fit. I changed out the rear o rings several times and all were the same. Is it normal for the breech to be a looser fit at the back? Has there been any recorded issues with the AF breech.
It was suggested that reducing the spring tension by shortening it might be advantageous so I cut a coil out. Its made the power wheel useable but has had no effect on the rogue shots
I put the Airforce top hat in with a gap of 2.2mm / .087” and a 1.8mm / .070” thick o ring and adjusted it for no improvement, in fact to be precise I experienced the same problems with it as with the TT version
I noticed a tiny burr on the inside of the hammer which I polished out, again for no improvement.
I pulled the valve in the bottle and I noticed that the brass plate on the top was easily moved. Is it supposed to be like that? When I replaced it I used blue loctite and just snugged it up. Is that ok or is there a specific setting? Every thing looked to be in working order and moving freely.
In short, after a week and a lot of wasted lead, and I mean a LOT of lead I’m no further forward so any helpful suggestions would be very much appreciated.
Edit
The fault was traced back to the tophat
Bullseyeft had exactly the same problem and it was resolved at http://www.talonairgun.com/forum/viewtopic.php?p=381938#p381938
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Still just adding thoughts here… since I don’t use the TT tophat, plus I don’t test a lot or seem to have rogue shots either. I use the same ammo as you list also, sticking mostly with the 18gr JSB, anything lighter is erratic.
In your highly magnified pics of the tophat, it shows the roughness of finish. The manufacture and sale of these tophats didn’t just happen and I’ve read posts by many users very happy with their performance. So either you got one that is a reject, somehow slipping by the inspector,, or,, it doesn’t really make a difference in smoothness of finish of this machined part that controls air release?
My belief would be that if the tophat stem is of poor quality causing rogue shots,, ALL shots would – should be rogue, not just one here and there.
Again… good luck in your quest finding perfection.
I know that Bullseyeft is having exactly the same problem. We’re both using the Talon Tunes Quick Change Top Hat and while looking at mine for alignment I noticed these marks. Could this be contributing to the problem?
Thanks for the feedback TM.22CondorSS
Thanks, that’s what I’m after and its very much a learning curve as I’m new to PCP. For the most part I’ve really enjoyed it but this part is really getting to me.
JSB 18.14gr, 15.89gr & 33.96gr & Baracuda 21.4
I’ve gone through a couple of thousand pellets. As I say I’m new to this but it seems to me that the likelihood of quality ammo from different manufacturers and in several different flavours all being that much off and with such frequency is pretty slim. As such it seems far more likely that its a factor of the gun rather than the pellets but I’m happy to be proven wrong.
So am I and that’s the problem. The rogue shots won’t go where their supposed to.
Seems you’re experimenting with the right things to achieve precision with the Condor.
Now for a “rogue” comment :winkn: about what I didn’t see mentioned, ammo. I would certainly expect you to be using the best quality pellets that your gun shoots accurate. But even the brands considered to be top quality can and very possibly will have some pellets with variation in weight or shape which will affect all or some aspect of precision.
It would be very time consuming to inspect, weigh, measure the headsize of each pellet for exact same dimension used in testing,, but that may be what it takes to get the answers you’re looking for, along with exact replication of each pellet loading procedure to eliminate the possibility of any skirt or head alteration.
Good luck in your quest :8: Myself, I’m happy hitting where I aim. :smilen:
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Thanks TM.22CondorSS
As I was reminded I got the same issues when I used the AF top hat, so I guess its not that. And as you say there’s an awful lot people very happy with them so it has to be some thing else.