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  • 7.5 French Brass No Longer Fitting in Dies

    Posted by james on August 5, 2022 at 11:22 pm

    Hey all,

    Not a new reloader, but I took a long hiatus while I lived in an apartment and didn’t have the space to set up.

    I buy Prvi 7.5×54 french ammo for my MAS, then (obviously) gremlin up all the brass and reload it. I used to have no difficulties with this, but in my new set-up the brass does not want to seat all the way into the reloading die – it stops around the neck and locks up.

    I was using the original dies I had in my old set-up, and thinking they may have something wrong with them, purchased another set of Lee dies that had the same exact issue.

    I’m using a Lee turret press, I’m properly lubricating my cases…but any case that I’ve fired from my MAS is having these issues.

    Is there a chamber or headspace issue on my MAS that’s causing the brass to be too big once I fire, or am I going crazy?

    james replied 1 week, 4 days ago 2 Members · 5 Replies
  • 5 Replies
  • 101stjetmech

    August 5, 2022 at 11:22 pm

    It will lock up at the neck if you have the decapping/neck expander set too high in the die. It’s basically trying to squeeze it down at the same time it’s trying to expand it.

  • StepVanity

    August 5, 2022 at 11:22 pm

    Beats me. Are you positive that your decap pin is entering the flash hole? Try sizing a few with the decap stem removed and see if you get full travel.

  • Sinky2086

    August 5, 2022 at 11:22 pm

    I don’t have the issue but I use RCBS dies and I convert 30-06 cases to 7.5 French (I have so many once fired 30-06 it is crazy). A quick search did find you are not the only one who has the issue.

    Lee dies are small base dies. Normally not an issue, but with some guns that have sloppy chambers you will have issues with the case expanding too much in the body and it will create a belt around the base of the cartridge if you try to force it into the die.

    You have a few options: get another brand of sizing dies (RCBS or CH4D), send your die to Lee with some of your cases to have them warranty the item, get a neck sizing die (only good if you are using a Mas 36), or modify the die yourself (I don’t recommend this).

  • Cleared_Direct

    August 5, 2022 at 11:22 pm

    Maybe take a picture of the press with die set up in it and another of the brass at the point where it’s getting stuck entering the die. Can you tell where the issue is? Mouth, shoulder, etc?

  • Renamon_1

    August 5, 2022 at 11:22 pm

    How many reloads are on these since you annealed?

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