21st Century bushing Flashhole deburring tool Yay or Nae?

308BAR

308BAR

CGN Ultra frequent flyer
Rating - 100%
100   0   0
Location
MetVan where damn hippys live
Any one using the 21st Century Flashhole deburring tool? Do you like it how do you like the function? Does it stop cutting once it bottoms out or is there a stop that needs to be set like the Lyman deburring tool? Does it chamfer a lot or little? Just like to get some feedback.

Thanks in advance
 
I put a 1/8" drill bit in my drill and lock the drill in a vice. Then I touch each flash hole on the inside of the case to the drill bit. You can feel it chatter as it cuts of the burr, then goes smooth as it cuts a little champfer.

I can do hundreds of cases quite quickly this way.

If the electric drill does not have a lock to keep it running at the right speed (not too fast) I use a radiator clamp around the handle/trigger.
 
Lyman makes a great little flash hole deburring tool. It can be easily used by hand or take it out of the wooden handle and chuck it up in a battery operated drill. I like it over a regular drill bit as mentioned by Ganderite because it has a pilot tip and a collar to set on the stem so that the depths on each case are fairly constant or at least stops us from getting to aggressive. I used to shoot with a well known Hunter Bench Rest Shooter that claimed this type of attention led to much of his success. Personally I am still on the skeptical side of the argument but will admit to going the extra step with my more accurate rifles where paying attention to detail can make a difference.

No offense Ganderite. I have used a drill bit when I misplaced my Lyman tool. Sometimes when I have a large batch to do I will do them by hand while watching TV. It's just a nice option.
 
I have the tool with the little guide pin and some times use it in the drill too.

I once ran a 20 round test (of each case prep) using the ammo lab equipment. Uniforming the primer pocket made no difference. De-burring the flash hole did make a significant improvement in SD. Since it only has to be done once, it is worthwhile.


Do not make the flash hole bigger. The smaller the flash hole, the better the SD.
 
IJust bought it for my 6x47L. Absolutely the best tool for this I have ever used. It stops on its own on the bottom, so trim length is irrelevant. It only has a very small radius that just takes the corner off of the top of the flash hole, nothing more.
 
kombayotch said:
IJust bought it for my 6x47L. Absolutely the best tool for this I have ever used. It stops on its own on the bottom, so trim length is irrelevant. It only has a very small radius that just takes the corner off of the top of the flash hole, nothing more.
Click to expand...

Thank you K for your first hand review. I have a Lyman and I don't like they way it indexes the depth using a stop at the case mouth and looking for a better system to debur.
 
308BAR said:
Thank you K for your first hand review. I have a Lyman and I don't like they way it indexes the depth using a stop at the case mouth and looking for a better system to debur.
Click to expand...

I have the Lyman one on my Casemate for bulk 223 brass and the Sinclair one with the square caliber specific stops. The 21st century one is in a different league. Like comparing the K&M chamfering tool to a standard chamfer/deburr tool.
 
kombayotch said:
I have the Lyman one on my Casemate for bulk 223 brass and the Sinclair one with the square caliber specific stops. The 21st century one is in a different league. Like comparing the K&M chamfering tool to a standard chamfer/deburr tool.
Click to expand...

Hey K one more questions do you need to expand the neck for the bushing or could you debur with a sized case?
 
My 6mm one is 0.239 So, as long as you don't have crazy neck tension, you can use it on sized cases.

This is what the cutter looks like:


The cutter is mirrored on the other side. It will only remove the excess material then it will not cut anything more.
 
Last edited:
Interesting read. The group with the largest financial and material resources USAMU says maybe.

https://www.facebook.com/USAMU1956/posts/10153282633384734

excerpt from the article

As a reader mentioned last week, it can be difficult to truly quantify the contribution to accuracy of these procedures, particularly when firing from the shoulder/in conditions. Members of this staff, as individual rifle competitors, do often perform these operations on their privately-owned LR rifle brass. One could ascribe this to the old Highpower Rifle maxim that “if you think it helps, then it helps.”

same article

For readers who saw the small 1000 yard test group pictured last week, it was fired with weight-selected domestic brass that had no PP/FH conditioning. (BTW, the 25-round, 5-group aggregate from which this group was chosen was also very small.)
 
You must log in or register to reply here.
Back
Top Bottom