Match brass prep: flash hole deburring
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- čas přidán 21. 12. 2020
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Cleaning up my flash holes is something I enjoy doing, and I feel it makes a difference for the limited amount of time it takes to do. The best part is you only have to do it one no matter how much you reload the brass. Choosing the right tool helps from damaging the inside of your brass so make sure you pick one that prevents too much grinding inside the case.
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Hey John, you drew your powder really really low on the cartridge: I know you were maybe exaggerating for the sake of the diagram, but without talking about flashover, I think this diagram boarders on dangerous.
I've had a tool like this since 1983 when loading for IHMSA shooting 7TCU. If there is any doubt, it DOES make a big difference. My only quibble is the tools that index on the case mouth is too inconsistent between batches if you work on differing calibers. Do a batch of cases today, change calibers then next month if you need more cases you have to duplicate the first batch by feel and guess but no way to measure. Because of that I believe in the bushing style tool (sinclair generation II or the 21st century one). Personally, I have a precursor bushing style that has a plastic knob for hand turning (no longer sold I think). Works great even if you want to go crazy and debur 45acp or 9mm.
Thanks for the inside view of the brass. That helped. Didn't even think of using my bore scope to view inside the case.
After watching this video I did a test. I did 400 pieces of Hornady factory ammo brass I had been holding onto. I got 9.8 grains of brass chips and flakes from inside the brass just using this one tool. I inspected a lot of them with my borescope and it was amazing how well it cleaned up all the flash holes that desperately needed deburring as there were tons of burrs on most of those 400 pieces.
Hello John, thanks for video! I do mine as well and it nice to see the inside shot to see the finished work. Consistency is everything! Great job!
Thanks again John. All your videos help me greatly.
I’m glad to see an old benchrest technique is being used. The video technology today vs what Precision Shooting magazine and shooters news had , twenty plus years ago would have made more of an impact on shooters.
The before and after in the case shots sold me. Very informative
Thanks for sharing. Nice to see just what is going on with the primer holes after cleaning them up.
I use a Lyman flash hole uniformer with the collar that is set for freshly trimmed cases. Once thing I find is the inside case base to case mouth length is not the same, even within a batch of same headstamps. The uniformer will definitely cut more brass from some cases than others, regardless of the amount of burr debris.
I have two wildcat pistols built for silhouette shooting, used Parma style Benchrest brass, and even if it was the best available at that time, the flash holes were erratic to be kind. Lyman has a similar tool, but multi caliber with an adjustable stop, that was used to deburr and slightly chamfer the inside of the hole. Your tool looks caliber or at least neck diameter specific, which looks light years better than my old one. Takes seconds, if only for peace of mind and possibly just possibly making everything possible similar, well worth the time.
Preparing brass is accomplished to maintain uniformity from shot to shot.
Awesome explanation! The up close visual certainly helped. Thank you for that and merry Xmas!
John, Merry Christmas. I wish I could contact you personally but it is what it is. Because of your help progress is coming. Shot a .086 group today but not satisfied until it’s consistent. Good factory rifle from a well known maker but good brass and a little technique; barrel prep, brass prep, projectile consistency, etc. Blessings to you and your family.
Consistent with reloads for consistent performance.
As far as consistency spend the $110 this tool is amazing. I wouldn't recommend this for bulk reloading.
Eye opening. I use one of the collet tools for deburring flash holes. But, I can see where you might be doing harm. Thanks for the video!
Huge difference will have to go and get the tool😁
I did some .223 Remington case-prep to zen-out yesterday and I remembered that I had one of these (which I'd bought on a whim) and decided to dig it out and use it. On some, but not all, the cases, I could definitely feel that it was doing SOMETHING. I think next time I'll lock the cases into my Lee case-trim chuck to get a better grip on them and hand-turn them counter to the tool, and compare the feel of what the tool is doing.
Hi John, I have been using this tool for over 2 years now and definitely agree that it makes a great job of consistently cutting and squaring up the flash holes , and like you said it only needs to be done once for the life of the brass , but there will always be people that say you don’t need to do that with brass such as Lapua but I beg to differ, glad you posted up a video too cheers all the best Gianni.