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Priming the 300 WSM

Discussion in 'Handloading and Reloading' started by LeverGunJunkie, Jun 2, 2010.

  1. LeverGunJunkie

    LeverGunJunkie Well-Known Member

    Just started reloading for the 300 WSM, and I've been learning that the fat cases cause their own set of issues. I've found suitable work arounds for all except one: My Lee Auto-Prime's (Hand held priming tool) jaws aren't wide enough to let the case in to be primed. I have the right shell holder, but the case won't fit in the tool :banghead:.

    So...what are my options? I'm looking at the Lee Ram Prime, but I fear the same issue may arise. What about the Lyman Ram Prime type deal? Kind of looking for a press mounted device that is cost effective. Does the RCBS hand tool work better with WSMs?

    I could use some advice on this one. Thanks.

    SAUMHUNTER79 Active Member

    I personally would get the Hornady hand priming tool, it's faster, works well and can be used with Hornady, RCBS, Redding, and Lee regular press shell holders. The thing I did was get that tool and bought a set of Lee "press" shell holders, not the auto prime shellholders, but the shellholders for reloading presses, they come in a green plastic case, you can get them from Cabela's, and now I can reload and prime for damn near any caliber under the sun.
  3. Smokey Joe

    Smokey Joe Well-Known Member

    Lee Auto Prime and the .300 WSM

    Lever Gun Junkie--BTDT!!

    When I began loading for the .300 Whizzie, I discovered the same thing. Took my dremel tool, put a small grinding wheel on it, and ground out the top of the Auto-Prime body so as to accept the fat cases.

    It worked slick.

    Lee later said that that treatment would not affect their warranty, when I had occasion to ask.

    So you can solve yr problem with a dremel tool and 5 min. work.

    No biggie.
  4. dakotasin

    dakotasin Well-Known Member

    i'm not familiar w/ that tool and it looks like smokey has your fix, but i prime wsm cases on an rcbs hand primer with no issues.
  5. ForneyRider

    ForneyRider Well-Known Member

    Ran into that with 270 WSM. I went with priming on the press.

    Else, get out the dremel.
  6. RDA 226sig

    RDA 226sig Well-Known Member

    I use the RCBS hand priming tool that uses the shell holder from my press so there is no problem with the fat cases fitting in.
  7. guntech59

    guntech59 Well-Known Member

    Yup. Dremel + 2 minutes. Works like a charm. BTDT with a 25WSSM.
  8. LeverGunJunkie

    LeverGunJunkie Well-Known Member

    Awesome guys. Dremel tool it is. I'm on it tonight.
  9. snuffy

    snuffy Well-Known Member

    Yeah, BTDT, got the "T" shirt!:)

    Now when you go to pull some mistakes, you'll find they don't go in your RCBS kinetic puller either. My solution to that was to chuck my inside deburr tool in a drill, make the opening bigger!:D
  10. LeverGunJunkie

    LeverGunJunkie Well-Known Member

    Snuffy. I have a Frankfurt Arsenal puller, but haven't tried to pull any mistakes yet. Good point I hadn't about. Thanks.
  11. hoghunting

    hoghunting Well-Known Member

    My RCBS kinetic puller doesn't have any problems with the WSM. I cut a piece of mouse pad and rolled it so it fits in the bottom of the puller. When the pulled bullets come out of the case, the nose sticks into the pad and doesn't get smashed into the bottom of the puller.
  12. snuffy

    snuffy Well-Known Member

    I use a foam ear plug. No dinged up bullet noses then!

    My RCBS is at least 10 YO, it had to be opened up to take the 300 WSM case. YMMV.
  13. dakotasin

    dakotasin Well-Known Member

    my rcbs puller accepts wsm and rum cases and still has the felt from rcbs to capture bullets. it is probably 6-7 years old - maybe older.
  14. ForneyRider

    ForneyRider Well-Known Member

    since we diverted to puller talk...

    I am using the Hornady cam-over puller, and it has pulled loads without even scratching the bullet. It is very fast as well. Way faster than the kinetic, no spilled powder, and no deformed bullets. Cheap, but you have to buy a collet for each caliber.

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