Trimming

[92xj]

New to the trimming world, though not new to reloading

300 win mag

My process...

Shoot
deprime
tumble
wire brush primer pocket
clean
lube
FL size
Trim to 2.610 give or take .002 (new step)
chamfer and deburr
load

Why am I getting a slight groove on the inside of the neck?  It has to be the centering pin in front of the cutter, and there has to be a little side press from the two sides of the trimmer not lining up perfectly. Though, the left side that holds the case has wiggle room to move when the alignment pin goes into the case and lines it all up to cut flush.  Is this groove somewhat normal for some folks?  I have fine grit sanded the centering pin and it is perfectly smooth to the touch and cotton.

[nwwanderer]

Could we use a reload specific subject?

[Alchase]

New to the trimming world, though not new to reloading

300 win mag

My process...

Shoot
deprime
tumble
wire brush primer pocket
clean
lube
FL size
Trim to 2.610 give or take .002 (new step)
chamfer and deburr
load

Why am I getting a slight groove on the inside of the neck?  It has to be the centering pin in front of the cutter, and there has to be a little side press from the two sides of the trimmer not lining up perfectly. Though, the left side that holds the case has wiggle room to move when the alignment pin goes into the case and lines it all up to cut flush.  Is this groove somewhat normal for some folks?  I have fine grit sanded the centering pin and it is perfectly smooth to the touch and cotton.

Cool pics of the process 

[Mtnwalker]

IMO ditch the Trimpro. I struggled with one for years and was never happy with the results. Finally got a Wilson and it is night and day.

[Encore 280]

Case mouth smaller than 30 cal or pin larger than 30 cal by a hair?    Does it on all cases?

[Hilltop123]

Can you get a picture of a piece of brass, that has not been resized? Curious of a before and after, look at the interior of the neck.

[BULLBLASTER]

Its just a mark from the 30 cal button(?) riding inside the case mouth. Likely is just superficial and not impacting the brass whatsoever. Can you feel it with a paperclip?
Just load and shoot them.

BTW trimming cases is the absolute worst. I avoid doing it whenever possible. 😆

[Shadrach71]

Your process is about the same as mine, wet tumble, anneal, size,  trim, chamfer and lastly I dry tumble it to polish...

[carpsniperg2]

Its just a mark from the 30 cal button(?) riding inside the case mouth. Likely is just superficial and not impacting the brass whatsoever. Can you feel it with a paperclip?
Just load and shoot them.

BTW trimming cases is the absolute worst. I avoid doing it whenever possible. 😆

  I have one that’s a 7mm guide that leaves a light ring like that after trimming. Even though I’m also agreeing it just superficial and shouldn’t impact anything. Call rcbs and they will probably just pop a new one in the mail to you.

[Bandocknr]

There’s a lot of opinions out there but mine is that you should ditch that universal trimmer and get the collet style it grips the back of the case tight with no room to move the universal style has springs that hold the metal tabs in place so you may not notice it but it doesn’t hold it true and locked in as well as the collet style.

[92xj]

Like this one?   
https://www.midwayusa.com/product/1012881432?pid=720825



I just bought that universal one and can easily return it.  I polished the pilot with wool today, still made a small mark.   Also, no pictures of pre sized cases, but there is no mark before trimming, only after, clearly happening with the pilot centering pin thingy inside the neck when rotating to trim.    I can feel the grove with a paper clip but doesn’t feel deep.   I plan to load them and see what happens.  Hopefully I don’t die.   

[jrebel]

The Lyman is great, especially for straight wall cartridges.   

If you’re mostly sizing necked cartridges, go with the Frankfort arsenal case prep center or other electric / drill powered trimmers.   I love the Frankfort arsenal because everything is in one unit.   It has worked awesome for me.  It does not work on straight wall cartridges…..that’s what I have my Lyman for.   

https://www.amazon.com/Frankford-Arsenal-Platinum-Hardened-Scrapers/dp/B00HS7JEB4/ref=mp_s_a_1_4?keywords=case+trimmer&qid=1677286241&sr=8-4

[92xj]

Thanks.  No straight walls for me.  Only 300wm, 270, 22-250.   

I know nothing of the power case prep world.   I’ve never trimmed before and only hand chamfered and deburred.   When the cases got too long, I tossed and bought new cases.   That worked for more reloads than I thought it would. And I’m not sure why I’m deciding to trim now, but I am.   

So, that Frankfort will do everything case related including trimming, it seems.  Why would I not do that?

[jrebel]

Thanks.  No straight walls for me.  Only 300wm, 270, 22-250.   

I know nothing of the power case prep world.   I’ve never trimmed before and only hand chamfered and deburred.   When the cases got too long, I tossed and bought new cases.   That worked for more reloads than I thought it would. And I’m not sure why I’m deciding to trim now, but I am.   

So, that Frankfort will do everything case related including trimming, it seems.  Why would I not do that?

Yes and it will save your hands from cramping up while manually doing the same.   Fast, easy, and a no brainer if you ask me.   Easy to set up and easy to use.  If you get one I am happy to give you a few pointers that makes it use and set up very easy. 

[buckfvr]

Clean that pilot with some scotch brite then use some dry lube on it and if that gouge persists, get a new pilot.  Cant explain that gouge into being ok.