Brocock Bantam still having a magazine problem

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hawkeye69

hawkeye69

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Sep 2, 2017
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Mesa, Arizona, United States
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I posted before about inaccuracy when using the magazine versus single loading. I took it back to AOA about 2 weeks ago, they shot it and got the same results as me, so they gave me a replacement mag. Yet still when I shot it the results were sub par using the magazine. Went back again yesterday to AOA talked to Darren. He looked at the mag and said it looked off to him so he gave me a new one saying it couldn't be anything else. Well I tried it this morning and it is worse than ever. This is the third magazine I've tried so obviously it must be something else.

Before I make another trip to AOA, does anyone here have any ideas as to what the problem could be?

From this morning 10 shots with the mag and 10 shots single load. Using the mag. is over a 2 inch spread.

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Not a clue... I have the Bantam in .177, have two magazines, and it shoots the same either single shot or with the Mag. So obviously something is wrong, and it shouldn't be acting like this... What is the range on those shot groups? I'm hoping you say 50 yards, since if its only 25 or 30 yards even the single group is below par for that rifle...
 
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Range was about 25 yards. It's just very inconsistent. Each time it's somewhat different, I might get 5-7 good shots the next time I shoot it but never an entire magazine. Usually the bad shots are towards the end of the string. But if I single fed it's alway very consistent. 

I emailed AOA about coming back asking who I should see. No reply as yet.
 
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Interesting. I think maybe its more than just your magazine. I shoot my .177 Bantam in 25M Bench Rest with .177 JSB Exact Heavy 10.3 gr at 920 fps (Medium Power setting), and routinely score better than 700. The gun will group ten shots inside of the 9 ring at that distance, easy. FYI, I shoot from the magazine during these tournaments. I would expect the .22 to be just as accurate. My .22 Renegade will do the same, and that's the same barrel and valve system as the .22 Bantam. 
 
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"Kdog"Is it inconsistent just with the magazine??? Have u shot it single shot without the mag....I'm thinking perhaps u are getting some kind of clipping issue with the moderator? Good luck...hope you figure it out!
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Single shot manual loading, there is no problem. If the moderator was clipping it would do so on a single load as well. It's only when using the magazine that things go badly. 

It's very curious.
 
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"Hynzie"whats the probe like crooked wobbly ,,,have u tried other pellet brands ,, can u cycle the pup ,,, decock it ,,,,remove mag,,,, push pellet out breach and inspect sounds like the pellet is clipping during transfer ,,,not sure of the set up would start with the recomendation ,im sure others got better ideas pat
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Using JSB 16's and 18's and when single loaded they perform fine. It's only when using the mag that the problem begins.It seems that somehow the pellet skirt is being damaged as it's pushed from the magazine into the breech.
 
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From AOA:I would recommend bringing the rifle to us and let us go through the rifle. The Bantam is under warranty. The Bantam is usually a very accurate rifle, I am sure we can get this issue worked out one way or another. I will not have a tech available until next week, please bring the rifle to us on Tuesday.

I'll post the results of their inspection when they are done with it. I suppose I will need to leave it with them. I'm looking forward to getting it right, Iove the look, size and feel of the rifle.
 
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Got an email from AOA this morning that Kip felt that he knew wjat the problem is. I took it in and he chamfered the end of the barrel where the pellet is fed and polished. Also changed the seal on the air stripper. He told me to take it home and try it, and bring it back if it still wasn't right. Excellent service from AOA. I tested it at home and it's a massive improvement. I'll give some additional testing before I declare it fixed, but it seems good.

According to Kip, it is a common problem.
 
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The cycling mechanism in the rifle may not be lining up the mag with the barrel properly. I had this problem with a Hatsan Gladius. I could feel resistance as I pushed the pellet into the chamber and noticed accuracy loss. I took it apart and noticed several of the pieces that involved spinning the magazine were wore. I replaced them and it worked like new.
 
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"davidsng"The cycling mechanism in the rifle may not be lining up the mag with the barrel properly. I had this problem with a Hatsan Gladius. I could feel resistance as I pushed the pellet into the chamber and noticed accuracy loss. I took it apart and noticed several of the pieces that involved spinning the magazine were wore. I replaced them and it worked like new.
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I notice resistance as the pellet enters the barrel, but Kip at AOA said that's natural. It's a new magazine (the third actually) and with the chamfering and polishing of the barrel the gun shoots 100% better. Could be more accurate? My groups at 28 yards aren't as tight as Kips showed me he was getting, but I believe he was shooting at 20 yards. I'm testing, I'll put a tin of pellets through before it before I decide if I can declare it fixed. 
 
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Wow, the groups you posted with and without the magazine where sub par. It has to be something else. My Bantam Sniper HR would stack em at the same distance magazine in or single loaded. I’ve have posted some 40 and 50 yard groups.

14.3 Crosman Premiers at 40 yards and JSB 18s at 50 yards. These were casually sent as I’m not a bench rest shooter.

1581239842_20500542155e3fce2296f044.55187999_56A21DB1-F8E8-4B08-9AFB-7FAB28D1E4D0.jpeg
1581239843_20296735425e3fce234db851.09389199_4E7DA323-1747-4429-846C-FAAC1A4D539E.jpeg

 
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