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Joined: Oct 2017
Posts: 95
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Oct 2017
Posts: 95 |
I'm going to start reloading for my S&W M&P AR-15. Do I need a small base sizing die set? Thank You
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Joined: Dec 2004
Posts: 17,241
Campfire Ranger
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Campfire Ranger
Joined: Dec 2004
Posts: 17,241 |
I never needed an SB die.
Now with even more aplomb
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Joined: Nov 2019
Posts: 788
Campfire Regular
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Campfire Regular
Joined: Nov 2019
Posts: 788 |
I have them, but rarely use them. Usually a solution in search of a problem. If you don't need one, they just overwork perfectly good brass which shortens useful life.
If your brass source is the gun for which you're loading you'll never need a SB die.
Sometimes individual pieces acquired via bulk brass purchases or range scrounging are found pretty stretched. Easiest way to identify them is to use something like a Wilson gauge. These pieces can be made to chamber using a SB die. Lacking a SB die some choose to run the pieces through a std sizer a couple times. The much better approach is to recognize these pieces were badly overstretched and simply cull them. When you load questionable source/stretched brass you can get a partial or complete separation.
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Joined: May 2002
Posts: 9,525
Campfire Outfitter
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Campfire Outfitter
Joined: May 2002
Posts: 9,525 |
I've never had to use one.
What is important is that the shoulder is set back .002" to .003" from the dimension it took when fired in the rifle.
Crush fit and a floating firing pin isn't the best combo.
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Joined: Oct 2017
Posts: 95
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Oct 2017
Posts: 95 |
Thank you gentlemen. All my brass is coming from Winchester White Box that has been shot through my rifle.
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Joined: Aug 2010
Posts: 48,020
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,020 |
I use a SB die set with absolutely no issues whatsoever. Most of my chambers are CLE though.. If you ever get a barrel with a tight chamber, you may wish you got the SB die set instead..
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Aug 2015
Posts: 13,234
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2015
Posts: 13,234 |
I've loaded thousands of rounds of range salvaged brass fired in rifles other than my own and not once needed a small base die.
Let's Go Brandon! FJB
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Joined: Dec 2021
Posts: 3,497
Campfire Tracker
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Campfire Tracker
Joined: Dec 2021
Posts: 3,497 |
Count me in the "Old Fart Syndrome" faction! LOL!
When I started reloading back in the early 70's, I was faced with a gent who had a Rem M742 .30-06. If it loaded a round, it wouldn't extract ....or ....it wouldn't chamber the next round. He was using RCBS FL dies. Set him up with a set of SB dies. Problem solved! I know lot'sa folks who reload for semi autos using FL dies and never have a problem. I've had a few "chokes" with FL resized brass. All my semi autos have SB die sets. Are they necessary? Uhhmmm.....I dunno? ....but my "Old Fart Syndrome" sez reloading for a semi auto requires a SB sizing die! 🙂
Last edited by martinstrummer; 05/22/22.
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Joined: Sep 2009
Posts: 1,596
Campfire Regular
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Campfire Regular
Joined: Sep 2009
Posts: 1,596 |
I've loaded thousands of rounds for various AR15 calibers. Never had to use SB dies
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Joined: Jul 2004
Posts: 6,662
Campfire Tracker
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Campfire Tracker
Joined: Jul 2004
Posts: 6,662 |
Standard dies work fine for me, even sizing range pick up AR brass for my rather tight chambered 527.
'Four legs good, two legs baaaad." ---------------------------------------------- "Jimmy, some of it's magic, Some of it's tragic, But I had a good life all the way." (Jimmy Buffett)
SotG
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Joined: Mar 2007
Posts: 12,617
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2007
Posts: 12,617 |
Several years ago I sized a bunch of 5.56 brass with a new standard die set to touch the shell holder. “Assumed” all was good without checking. But half wouldn’t chamber in either a Mini 14, S&W, or Rock River. Gives you a really stupid feeling So I got to do it again as I got around to using them. Second go-round was with a SB die, just in case. Also did around 2k different once fired with the SB. Some must have been fired in a 7.62 chamber while some were easy.
If I’m not dead by the time I cycle thru this brass I’ll try the standard die again, now that I know what it has been fired in. But basic once fired and new to me will go thru the small base sizer. Just in case.
“When Tyranny becomes Law, Rebellion becomes Duty”
Colossians 3:17 (New King James Version) "And whatever you do in word or deed, do all in the name of the Lord Jesus, giving thanks to God the Father through Him."
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Joined: Oct 2017
Posts: 95
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Oct 2017
Posts: 95 |
When I started reloading back in the early 70's, I was faced with a gent who had a Rem M742 .30-06. If it loaded a round, it wouldn't extract ....or ....it wouldn't chamber the next round. He was using RCBS FL dies. Set him up with a set of SB dies. Problem solved! I know lot'sa folks who reload for semi autos using FL dies and never have a problem. I've had a few "chokes" with FL resized brass. All my semi autos have SB die sets. Are they necessary? Uhhmmm.....I dunno? ....but my "Old Fart Syndrome" sez reloading for a semi auto requires a SB sizing die! 🙂 I come from the same background, thus my question. LOL!!!
Last edited by Stevens223; 05/25/22.
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Joined: Dec 2005
Posts: 442
Campfire Member
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Campfire Member
Joined: Dec 2005
Posts: 442 |
Set the die up right and you don't need a sb die. Run the case up into the die, now look under the die between it and the shell holder. See that gap? That is the flex in the die and press. Screw the die in a little more at a time till the brass chambers in your gun.
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