OAL cartridge help

[PD Gohil]

Making my own cartridge for the Hornady OAL gauge. Got the recommended drill bit and bit. Chucked up ama once fired 6.5 creedmoore and it worked perfect. Next to 223.

Laupa trimmed and sized brass, drilled fine. But when I try to thread it, it slips in the chuck and deforms the brass. Next try, I cranked it down enough to hold, and dang if the jaw pressure didn't deform the brass. Tried and ruined 4 pieces of premium brass..... any ideas??

Thanks

PGohil
WV

 

[Bill Rodolph]

I use a sizing die to hold the brass in my lathe. Seems like I have to tap it out, so leave the stem out.

 

[NorCalMikie]

That's why I went to Hornady to get my cases made. What $10.00/$15.00? All done.

 

[shortthroat]

no problem chucking the brass in the three jaw chuck here. do you have the correct tap? Perhaps you are trying to cut oversized threads, or perhaps you have drilled too small for the tap.

I did have your problem when trying to tap LC brass in .50BMG. That brass is very hard and not easy to tap or drill. I bored the base and fitted an Aluminum plug that was tapped correctly, and then pressed it in place with red Loctite. Finally I turned the face of the threaded plug exactly flush with the cartridge base.

 

[Doug30racer]

drill a hole in a block of wood, cut through the hole, put in a vise? using the right sizes of course

 

[PD Gohil]

That's why I went to Hornady to get my cases made. What $10.00/$15.00? All done.

Right, it's cheaper to buy one. But I spent $20 on the drill bit and tap. Once I figure it out, each caliber cost me only a once fired brass and so.e minimal labor "

 

[PD Gohil]

no problem chucking the brass in the three jaw chuck here. do you have the correct tap? Perhaps you are trying to cut oversized threads, or perhaps you have drilled too small for the tap.

I did have your problem when trying to tap LC brass in .50BMG. That brass is very hard and not easy to tap or drill. I bored the base and fitted an Aluminum plug that was tapped correctly, and then pressed it in place with red Loctite. Finally I turned the face of the threaded plug exactly flush with the cartridge base.

Yup, correct tap, worked flawless on my 6.5. thought about the drill bit being small, but is what I read on here was needed. ‍

 

[hogpatrol]

What size drill are you using? IIRC, it's an "L" drill. Also, are you using a #1 tap? A little lube helps too.

The bulletin describes using a .290 drill bit. Yep, it's an L.

https://bulletin.accurateshooter.com/tag/o-a-l-gauge/

 

[Fast14riot]

drill a hole in a block of wood, cut through the hole, put in a vise? using the right sizes of course

A 3/8" hole is about right for 223 diameter cases.

Also, if the tap is grabbing, back it out half a turn and proceed 1 full turn. Do this until its done.

 

[M-61]

Making my own cartridge for the Hornady OAL gauge. Got the recommended drill bit and bit. Chucked up ama once fired 6.5 creedmoore and it worked perfect. Next to 223.

Laupa trimmed and sized brass, drilled fine. But when I try to thread it, it slips in the chuck and deforms the brass. Next try, I cranked it down enough to hold, and dang if the jaw pressure didn't deform the brass. Tried and ruined 4 pieces of premium brass..... any ideas??

Thanks

PGohil
WV

try P1ZombieKiller site member. Perfect work, communication, price, time to ship, and a gentleman. Wes is excellent.

 

[Cecil S.]

Tap Magic makes things much easier. Check it out.

 

[PD Gohil]

What size drill are you using? IIRC, it's an "L" drill. Also, are you using a #1 tap? A little lube helps too.

The bulletin describes using a .290 drill bit. Yep, it's an L.

https://bulletin.accurateshooter.com/tag/o-a-l-gauge/

Yes, "L" is the drill bit used.

The tap magic may be the trick, I'll give it a try.

Thanks.

 

[Walt Krafft]

If you are doing it on a lathe, single point the threads.

 

[bozo699]

I use a Wilson case holder to hold mine, never have had a issue.
Wayne