17 AH
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Posted by: hunter_19_54
03/28/2002, 00:51:12


Thanks guys for the help. The target they sent me says 11.5 Gr H116. I have tried AA1680 & 2200, H4227.The gun shoots 1/2" or less with 12.3 to 12.5 but I start blowing primers. At 12 Grs it shoots good but I eather split the case necks or the cases start spider webbing at the case neck & sholder. I only get 2 to 3 shoots from a case. I talked to my gunsmith today and he has a reamer on order. I am willing to try anything if you guys think it will help. I use Win cases & primers,20GR V-Max,22 Gr Calhoon.& 25 Gr Rem & Hornady. Thanks for your help Ron


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Re: 17 AH
Re: 17 AH -- hunter_19_54 Top of thread Archive
Posted by: Dan C ®
03/28/2002, 08:51:44

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Couple of questions Ron. What is your case forming procedure and what dies are you using? What do your case necks measure after firing? What do you mean by 'spider webbing'? Lastly, try either some Berger or Starke bullets. I had mediocre luck with the V-Max and Calhoons also. Heck, I'll even send you a handful of Starkes to try, and make sure to play with the seating depth.

Unless your chamber has an unusually large neck area, the fact that it is generous at the base will not cause you any drastic accuracy problems. Also, if your gunsmith simply ordered a reamer without specifying the dimensions, chances are that the one he gets will be no better than what you have. The chamber Cooper uses is pretty much 'standard', just like all the rest of their chambers.

I have had 2 Cooper 17 AH's, and know of at least 3 more, and all are shooters with the right compononts. Mail me if you like, or call 307-778-9374. I hate to see you do something as drastic as setting back and rechambering until all your options are exhausted...........particularly since Cooper says that the rifle is in spec. They probably are not lying. They likely did a chamber cast to check the chamber dimensions and I'm sure they would have fixed it if there was a problem. They really are a good company and want to make their customers happy.

Dan C

Modified by Dan C at Thu, Mar 28, 2002, 08:53:17


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Re: 17 AH
Re: Re: 17 AH -- Dan C Top of thread Archive
Posted by: Cook
03/31/2002, 20:41:13


One more question, are you sure you arn't leaving contaminents in the cases from tunbleing. Possibly some wax? That'll cause pressure to spike quickly.


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