Well, finally we have a local primer manufacturer.
But their new Small Pistol primers are a little larger than Magtech, Remington, Federal or Winchester primers.
If a .40 S&W case was shooted some times everything is OK , but, if case was shooted many times it is necessary to excert much force to put it into primer cavity.
Costs of involved components are considerable, local primers cost the half of Federal and 60% of Magtechs and, cases are imported, expensive for scraping them in only several reloads. Moreover, now we have shortage of imported primers.
One solution: grind the point of a drill bit, making it flat and square, and drilling the pocket, softly with a manual drill machine.(Bit diameter same as new case primer cavity diameter)
Removing a little of the radius formed between the lateral cylindrical surface and the bottom lets primer fit in the pocket .

Have anybody experience with this kind of reworking in a .40 S&W or 9mm pistol cases or similar applications?
Any safety warning must be considered?

Thanks in advance for your help

BA Shooter

Making a drill bit to ream out the primer pocket is ok. There is/was a tool to remove the crimped in primer, this makes the primer pocket uniform. RCBS makes a primer pocket swager that corrects this problem also. Just dont make the pocket deeper. Deeper primer pocket would be a problem.

I agree with 243winxb: Use a primer pocket crimp reaming tool (a neck chamfering tool can be used also) to create a tapered entrance to the primer pocket on pockets that seem too tight.

I doubt that your domestic Argentine primers are actually larger in diameter; they are probably just made with slightly harder metal. However, it is not unusual to find that some brands of primers seat with more resistance than others. At any rate, making a very slight chamfer at the mouth of the primer pockets will cause no harm and make starting the primer easier.

Thanks for your advises.

I'll see in RCBS brochures how is this tool like.
A little chanfer in the mouth is easy , I will make it in all cases where resistance happens.


BA Shooter

BAShooter
Lyman make a primer pocket reamer as well as a primer pocket uniformer.
www.midwayusa.com
Lightning93

I use a Craftsman 67165 countersinking tool to remove the crimp and put a nice chamfer on the primer pocket. I just went to the Sears site, but couldn't find the chamfer I use (I've had it for many years). They offer a 3/4" version, the 67166, for about fourteen bucks. These countersinkers are miles ahead of the combo tools offered by the reloading companies because they stay sharp forever. I don't chamfer my casemouths because I use boattail bullets exclusively in my rifles and I crimp everything. I do like the RCBS primer pocket scraper-outer brushes; those bad boys work 100X better than a ground-off drillbit.

Thanks for your advises.

I made a slight chanfer and problem was 98% solved. Only two cases, out of 100, did not let install the primer. Reamering with the flat bit solved it.

I saw the Primer Pocket Uniformer from Lyman, it looks nice, but it is indicated "For rifles only".

RCBS offers a " Primer Pocket Swager Combo" It consits of a die , a central pin, an insert and a bushing, I really do not know how it works.

In a first look I did not find out a Contersink in the Brownells # 55 Catalogue (2002/2003). I will see old ones .

Thanks for your time and support.

BA Shooter