Comments on: Make Your Own Modified Case for Hornady O.A.L. Gauge

By: Dan

Dan — Wed, 13 Nov 2019 18:47:54 +0000

using fire formed case will cause the tool to be gun specific

full length will cause too tight neck tension

I use full length case install & remove bullet now it fits all

By: Ralph

Ralph — Mon, 18 Feb 2019 13:27:58 +0000

Ben…..

mentioned in the video neck and body sizing not pushing back the shoulder

By: Ralph

Ralph — Mon, 18 Feb 2019 13:24:04 +0000

if the case isn’t sized right to chamber then you either have too much headspace or not enough headspace…therefore COAL will vary. If you don’t have enough headspace upon closing the bolt will force case to chamber effecting the measurement of the gauge. And bullets vary ogive that effects measurement. In my experience full length sizing eliminates troublesome gauging…. correct me if you feel I’m off base here.

By: Benjamin Rahoy

Benjamin Rahoy — Mon, 01 Aug 2016 18:03:49 +0000

As I have looked into making my own cases, I have noticed the do-it-yourself instructions mention to full size the case. This contrasts to what Hornady mentions on their website for sending fire-formed cases. Hornady states to not resize the case.

Any ideas of why Hornady would not want resizing but others mention this step?

By: Brian Adams

Brian Adams — Mon, 07 Dec 2015 20:07:32 +0000

A 19/64″ drill is better than 9/32″, as it is slightly (+.006″) larger than the ‘L’ and it’s easier to tap. Since this will not bear any real load, having slightly shallower threads is just fine.

I recommend body sizing the case exactly like your loaded ammo, e.g. shoulder pushed back .002″ from fired or whatever.

This can be drilled and tapped without a lathe, using a drill press, with the case in an inverted body die, but the tap in the chuck is turned by hand (not the motor!), the press is just to align the tap vertically with the die / case, and the press handle is used to apply down pressure on the tap and advance it while you hand turn the chuck / tap. Easier to show than describe. It doesn’t require the precision of a lathe, in fact if you inspect the Hornady cases they’re not perfect either.

By: Richard King

Richard King — Thu, 09 Apr 2015 20:50:09 +0000

I just use a taper reamers to open up necks until bullet slides through.

By: Henry Glenn

Henry Glenn — Thu, 09 Apr 2015 14:13:57 +0000

A very important step was overlooked!
you have to expand the neck to .001 over bullet dia. for it to slide in and out.
A full sized case will not work. It has too much neak tension. no one makes a expander of this size. I have proposed this idea to Sinclair’s. You have to turn your own from next size up expander.

By: Longshot

Longshot — Wed, 08 Apr 2015 17:25:58 +0000

Or you could send Hornady two fired cases from your gun and a check for $15.00 and get your modified case back in two weeks.

Editor: Good point. Here is the link for this service: https://www.hornady.com/store/Modified-Cases/

By: Leslie

Leslie — Wed, 08 Apr 2015 13:23:24 +0000

Also one would have to be real careful when chucking a case in the lathe and not over tighten crushing and or deforming the case.

By: Leslie

Leslie — Wed, 08 Apr 2015 13:22:10 +0000

Why not used a fire formed case then tap, that way the case fits the chamber perfectly and produces a more concentric diameter between the case OD and the tapped hole!