1. Unify trimming the full sized brass to length should be part of your case prep.  Hence brass will streach from use and sizing, so make sure you are re-trimming about every third reloading; with the brass trimmed to the correct 1.754".

2. Problem with the cases not priming correctly, is chances are the cases had staked primers to begin with.

There are a lot of ways to remove the stakes/ridges, but if you are just doing small batches, then RBCS primer pocket crimp remover (small primer size), and just pick up a coupling to make a drill adapter, so you can just it in a drill.


Note, don't remember if the allen bolt is 8-24 or 8-32, but just take the bolt to home depot to look in hardware metal bin about middle of the isle, to find the correct coupler size.  And again, the coupling OD will be small enough to fit in the jaws of a standard 3/8" drill chuck.

Hence we need to get from crimped pocket that still has the sharp edge wall after depriming, to crimp removed and entrance of the primer pocket chamfer instead.
Note, primer pocket depth cutter/de-buring tool, is not the same as a primer pocket chamfer tool.


To add, if you go to the armory forum here on the site, and scroll down, will find the reloading section that can be very helpful when it comes to reloading problems as well.

https://www.ar15.com/forums/Armory/Reloading/42/

On the crimped primer pockets, you have the inner budge from swage crimping of  the primer pockets, then there is the top of entry chamfer to allow the primer to enter the channel correctly as well.

If cases where chamfered, but not cleanly swaged all the way around inside, could be that one side still have the budge, and why the primers are trying to cant on you on the way in.

The cutter tools are not bad, so long as you hold the case  to the cutter, and the tools like the RCBS with larger end stop work very well for small counts of prep.

As for larger prep work and still working off a single stage press to reload, then super swage 600 and other tool like it, are not that bad.  The downside, these tools work off the web thickness of the case, so pretty much have to batch your brass to same manufacturers, then set the tools up for each batch of brass to swage the primer pockets.  Hell, its the same for my 1050, that has the swager built into it.

Lastly, on some of the imported mil spec brass with crimped primers, primer pockets can be on the tighter side, and in some cases, the primer pocket depths on the shallower side as well.  Most of us will just trash such off brass since it will take extra attention like use a primer pocket depth cutter to get it right.

The downfall to that tool, as well as other tools that are using the inside of the web to support the case as well, its it using the web thickness of that case type, and if you are swaging different manufacturer cases, you have to batch them by manufacturer, then re-adjust the tool suport rod each time for the different manufacturer web thickness.  Trust me, I have the tool, and can not count the many times I have bent the adjustment rods, buy having another manufacturers case slip in to the batch, that has a thicker web isntead.

With a spin cutter that is just using the bottom of the case rim for it depth of cut, does not use the web thickness of the case, and you can just go buck wild on any case to remove the primer staking's isntead.