A tough reloading question
I have a small wildcat based on the 5.7x28MM case. I have loaded several cases with 296. The case dimensions have all been checked...same length, neck has clearance, same charge, same primer, same lot of brass. One primer shows a normal primer hit, the second fires but has flowback around the firing pin hit. The velocity for both are the same within 20 fps. All fired within minutes of each other. My gunsmith thinks it could be connected with the fine ball powder falling into the flash hole and somehow causing the problem...sound possible? Other ideas?
0
-
Is your flash hole any larger than other cases that use the same size primer? Is 296 much smaller than the "normal" powder for a 5.7x28? Are you compressing the charge? If yes, the gun smith might be right. Bob 0 -
It could be the flash hole size or it could be a primer pocket with a defect (out of round, slightly larger).
Only one case doing it or several? If just one, toss it.
NOTE: To economize postings, edit or delete previous post. I edited this one to add this tip.0 -
Sorry to use up another post but, you are using RIFLE primers? Bob 0 -
quote:Originally posted by babun
Sorry to use up another post but, you are using RIFLE primers? Bob
Also. there was some FN brass that is coated, is that what you are using?0 -
I am using FN brass but I have removed the coating. I am using rifle primers, they are Fed 200s. Probably a little over 50% are doing it. I am not compressing the load. 296 easy flows into the primer flash hole. And I took them out to the range in my hunting box base down on about 1 mile of bumpy road. That would have help pack it into the primer flash hole if that is what is causing it. 0 -
quote:Originally posted by 5mmgunguy
I am using FN brass but I have removed the coating. I am using rifle primers, they are Fed 200s. Probably a little over 50% are doing it. I am not compressing the load. 296 easy flows into the primer flash hole. And I took them out to the range in my hunting box base down on about 1 mile of bumpy road. That would have help pack it into the primer flash hole if that is what is causing it.
Next time you go down that road, keep them inverted and see if that makes a difference.0 -
It seems to me that 296 can be hard to light and mag primers are called for use big pistols. So is that MEK still your stripper of choice? 0 -
No I am not using MEK, I am using Citranox double strength. Actually works better. But I am only taking the coating off because I am using them in a bolt action rifle. 0 -
i am assuming that you have uniformed all the primer pockets and deburred the flash holes. if not Lee makes some inexpensive tools for the job(s)that can be rounded up at Mid-Way and probably most any online sporting goods dealer. you may want to try this at least to elimainate the problem from primerpocket/flash hole. good luck 0 -
quote:Originally posted by vdms55
i am assuming that you have uniformed all the primer pockets and deburred the flash holes. if not Lee makes some inexpensive tools for the job(s)that can be rounded up at Mid-Way and probably most any online sporting goods dealer. you may want to try this at least to elimainate the problem from primerpocket/flash hole. good luck
This action may make the problem worse. If a large flash hole/small powder IS the trouble, anything you do, except to "weld" the flash hole smaller, would aggravate it. Cleaning up or deburring them would allow MORE powder into the primer.
Perhaps look into the thicker cup primers made for military machine guns??? Bob0 -
how close are you to max loads. not all loads will show signs of excessive pressure when you get real close, and not all of the various signs will show up. (hope this makes sense). now comes the process of elimination until you isolate the problem. 0
Please sign in to leave a comment.
Comments
11 comments