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how to trim 50-90 brass (Read 1477 times)

bullshop Full Member Offline Posts: 201 Joined: Sep 14^th, 2017	how to trim 50-90 brass Nov 24^th, 2022 at 6:47pm	Print Post
	I hope someone here can help me. I need a case trimmer that will handle the 50-90 Sharps case. I have an RCBS trim pro and the older Forster but neither can handle the 50-90 case . Anyone no of a solution for my problem ?


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dragonblood9 Newbie Offline Posts: 8 Location: mesa, az Joined: Aug 20^th, 2021	Re: how to trim 50-90 brass Reply #1 - Nov 24^th, 2022 at 7:02pm	Print Post
	I just bought a Forster classic trimmer, requires one of the collets that are NOT included in the kit. Check their site


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GT Frequent Elocutionist Offline Posts: 2039 Location: Northeast Wyoming Joined: Jun 28^th, 2015	Re: how to trim 50-90 brass Reply #2 - Nov 25^th, 2022 at 9:01am	Print Post
	The trimmer head on the Wilson I use most is only a 1/2" so I dug out a Lyman Universal I picked up somewhere - didn't think it would open up far enough but it does. The cutter on my Lyman is carbide and I don't think that was original so I'm not sure if the original would have worked either... The current setup works though.

	"To invent, you need a good imagination and a pile of junk" T. A. Edison "The trouble ain't that there is too many fools, but that the lightning ain't distributed right" M.T.
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Cbashooter Frequent Elocutionist Offline Posts: 1570 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: how to trim 50-90 brass Reply #3 - Nov 25^th, 2022 at 11:49am	Print Post
	Sure is nice to see another bench that looks like the top of all of my benches..


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: how to trim 50-90 brass Reply #4 - Nov 25^th, 2022 at 12:03pm	Print Post
	I recently had to get set up to trim .50-140-3.25 cases for my Sharps, and I did a WTB ad at a few locations to get an obsolete Lyman drill press trimmer. Had to buy a pilot separately, and Lyman stopped offering those also, but found a new .512" collet on Ebay. The Lyman drill press trimmer is fantastic! Not only does the trimming well, but does it super fast. Just set up the case holder on the drill press table, and chuck the trimmer in the chuck. Then set the stop on the drill press and I can trim a case in seconds. Just have to keep light pressure on the drill press head, so you don't flex the stop and force it farther than the stop. (You need to *Login* or *Register* to view media files and links)

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Hiwall55 Senior Forum Member Offline Posts: 468 Location: west central Illinois Joined: Jun 30^th, 2012	Re: how to trim 50-90 brass Reply #5 - Nov 25^th, 2022 at 4:46pm	Print Post
	I use the rcbs pro high capacity trimmer will do all 50 calibers, I have it set up for 50/90 right now.


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ndnchf Frequent Elocutionist Offline Posts: 1046 Joined: Mar 6^th, 2014	Re: how to trim 50-90 brass Reply #6 - Nov 25^th, 2022 at 5:54pm	Print Post
	I use a Lyman universal trimmer for .50-70 and .50-95. It should work fine for .50-90 too.


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craigster Oldtimer Offline Posts: 684 Location: lost coast CA Joined: Feb 20^th, 2011	Re: how to trim 50-90 brass Reply #7 - Nov 26^th, 2022 at 12:51am	Print Post
	RCBS made a file trim die at one time. You might find one on FleaBay or GB.


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50target Full Member Offline Posts: 135 Location: Alabama Joined: May 27^th, 2014	Re: how to trim 50-90 brass Reply #8 - Dec 1^st, 2022 at 9:49pm	Print Post
	Have you considered one of cheap Harbor Freight miniature chop saws and set up a stop for the correct length and should be fast and uniform Just a thought. Bob


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: how to trim 50-90 brass Reply #9 - Dec 2^nd, 2022 at 12:05pm	Print Post
	50target wrote on Dec 1^st, 2022 at 9:49pm: Have you considered one of cheap Harbor Freight miniature chop saws and set up a stop for the correct length and should be fast and uniform Just a thought. Bob I use one all the time, but they're worthless for small amounts of trimming, or very precise trimming. I use it to rough cut cases, and then final trim with a good trimmer.

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ndnchf Frequent Elocutionist Offline Posts: 1046 Joined: Mar 6^th, 2014	Re: how to trim 50-90 brass Reply #10 - Dec 2^nd, 2022 at 12:58pm	Print Post
	I concur with Vall. The HF chop saw is a great tool, but it can't match the precision of a good trimmer. That being said, I've been able to improve the consistency of my chop saw cuts by making a simple jig to cut them. I've actually made 7 or 8 of these for different diameter case mouths. With some deburring, it could work in a pinch if a trimmer were not available. Check out the short video I made about it. (You need to *Login* or *Register* to view media files and links)


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: how to trim 50-90 brass Reply #11 - Dec 2^nd, 2022 at 1:22pm	Print Post
	ndnchf wrote on Dec 2^nd, 2022 at 12:58pm: I concur with Vall. The HF chop saw is a great tool, but it can't match the precision of a good trimmer. That being said, I've been able to improve the consistency of my chop saw cuts by making a simple jig to cut them. I've actually made 7 or 8 of these for different diameter case mouths. With some deburring, it could work in a pinch if a trimmer were not available. Check out the short video I made about it. (You need to *Login* or *Register* to view media files and links) Pretty slick Steve! My jig is made from scrap hardwood that I use my router to cut a channel into. So I'm holding my cases the opposite direction, and rims butt up to my block when laid in the channel. I adjust the block to the depth of the cut, and shim under the end for the angle I want to cut. Then once it's set up I cut as you do by going partway through, then turning it 180 to cut the other half.

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ndnchf Frequent Elocutionist Offline Posts: 1046 Joined: Mar 6^th, 2014	Re: how to trim 50-90 brass Reply #12 - Dec 2^nd, 2022 at 1:39pm	Print Post
	There is something to be said for spacing off rim end like you are doing. Your final cut length may be more consistent. Spacing off the mouth like I do requires all the cases to start at the same length, If not, the cut length will vary. But since I use a trimmer for the final length it doesn't really matter. It just shows there are multiple ways to approach the situation


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: how to trim 50-90 brass Reply #13 - Dec 2^nd, 2022 at 5:52pm	Print Post
	I agree Steve. Since this is just a rough cut accuracy is secondary to getting them done quick and easy.

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ISS Oldtimer Offline Posts: 570 Joined: Feb 24^th, 2013	Re: how to trim 50-90 brass Reply #14 - Dec 6^th, 2022 at 11:24pm	Print Post
	Try the Forster. Option "B" is buying a LEE for each cartridge. Rich


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