Go Back   Maryland Shooters > Topics of Interest > Reloading
Don't Have An Account? Register Here

Join MD Shooters

Reply
 
Thread Tools Display Modes
Old July 29th, 2020, 07:05 PM #1
Atrox88 Atrox88 is offline
Member
 
Join Date: Jan 2016
Posts: 614
Images: 2
Atrox88 Atrox88 is offline
Member
 
Join Date: Jan 2016
Posts: 614
Images: 2
300 Blackout RCBS dies

I was looking to buy some RCBS 300blk dies. Midway has two listed and I can't figure out the difference except on says "RCBS AR Series Small Base 2-Die Set with Taper Crimp" and the other says "RCBS 2-Die Set." I love that crap. I'm trying to figure out if either will work or there is a specific one I should be using.

https://www.midwayusa.com/product/1011278027?pid=614779

https://www.midwayusa.com/product/1011284542?pid=261325
__________________
US ARMY 1972-1975

Mangia merde e morte
Atrox88 is offline   Reply With Quote
Old July 29th, 2020, 07:53 PM #2
Uncle Duke's Avatar
Uncle Duke Uncle Duke is online now
Senior Member
 
Join Date: Feb 2013
Location: Not Far Enough from the City
Posts: 6,906
Uncle Duke Uncle Duke is online now
Senior Member
Uncle Duke's Avatar
 
Join Date: Feb 2013
Location: Not Far Enough from the City
Posts: 6,906
Quote:
Originally Posted by Atrox88 View Post
I was looking to buy some RCBS 300blk dies. Midway has two listed and I can't figure out the difference except on says "RCBS AR Series Small Base 2-Die Set with Taper Crimp" and the other says "RCBS 2-Die Set." I love that crap. I'm trying to figure out if either will work or there is a specific one I should be using.

https://www.midwayusa.com/product/1011278027?pid=614779

https://www.midwayusa.com/product/1011284542?pid=261325
RCBS makes and markets small base dies specifically for semi-automatic and lever action rifles. They will size cartridge cases a tad smaller in size, as well as bump a shoulder a bit more, for the purpose of ensuring ease of chambering, in firearms that don't have the powerful camming action of a bolt action rifle.

You will get a lot of mixed opinions regarding whether or not small base dies are "necessary." The tradeoff to chambering ease is that the more you work brass, the shorter its life. In practical terms IMO, the question becomes, shorter than what exactly? The answer becomes, shorter than it might otherwise be.

Speaking strictly for myself, I'm much more concerned with functionality than I am with brass life, and for that reason I use small base dies for the AR platform. That's just my preference. Could I get away with not using them? Probably. I'd be less certain if I were forming BO cases from .223 brass that wasn't originally fired in my rifle.
But for me, if I'm going to err, it'll always be on the side of doing what I can to maximize function.
Uncle Duke is online now   Reply With Quote
Old July 29th, 2020, 08:00 PM #3
j8064's Avatar
j8064 j8064 is offline
Garrett Co Hooligan #1
 
Join Date: Feb 2008
Location: Deep Creek
Posts: 11,120
j8064 j8064 is offline
Garrett Co Hooligan #1
j8064's Avatar
 
Join Date: Feb 2008
Location: Deep Creek
Posts: 11,120
Thee main difference is small base dies will resize case bases to a slightly smaller diameter than regular dies to mitigate chambering issues in some AR's. I've found a couple of my rifles prefer SB rounds. In others, any full length sized case feeds and chambers fine. I have both die sets.

If you do not know what case style your 300 AAC platform likes best and if you're hung up on RCBS quality, go for the small base set. It will work your brass and shorten its life, but there are a zillion free .223/556 range cases around that can be reformed into 300 AAC.

For actual reloading (and as a better and cheaper alternative) you might consider a Lee die set. The FL sizing die and the FCD die work well vs. trying to adjust a taper crimp on other brands of dies. I've been using this set for several years and it loads very accurate ammo for me. YMMV.

https://www.midwayusa.com/product/101774921?pid=934234

Good luck.

__________________
"Happiness is a warm gun..." - John Lennon, 1968

"Happiness is also a warm Beagle" - j8064
j8064 is offline   Reply With Quote
Old July 29th, 2020, 08:00 PM #4
kstone803's Avatar
kstone803 kstone803 is offline
Official Meat Getter
 
Join Date: Feb 2009
Location: Ltown in the SMC
Posts: 3,185
kstone803 kstone803 is offline
Official Meat Getter
kstone803's Avatar
 
Join Date: Feb 2009
Location: Ltown in the SMC
Posts: 3,185
Quote:
Originally Posted by Uncle Duke View Post
RCBS makes and markets small base dies specifically for semi-automatic and lever action rifles. They will size cartridge cases a tad smaller in size, as well as bump a shoulder a bit more, for the purpose of ensuring ease of chambering, in firearms that don't have the powerful camming action of a bolt action rifle.

You will get a lot of mixed opinions regarding whether or not small base dies are "necessary." The tradeoff to chambering ease is that the more you work brass, the shorter its life. In practical terms IMO, the question becomes, shorter than what exactly? The answer becomes, shorter than it might otherwise be.

Speaking strictly for myself, I'm much more concerned with functionality than I am with brass life, and for that reason I use small base dies for the AR platform. That's just my preference. Could I get away with not using them? Probably. I'd be less certain if I were forming cases from .223 brass that wasn't originally fired in my rifle.
But for me, if I'm going to err, it'll always be on the side of doing what I can to maximize function.
This. I run the small base dies for my AR calibers. Never had an issue. And I haven't had any issues with brass life, mostly because I lose it before that becomes an issue.
__________________
"Misanthrope? I don't hate my fellow man, even when he's tiresome and surly and tries to cheat at poker. I figure that's just a human material, and him that finds in it cause for anger and dismay is just a fool for expecting better." - Buster Scruggs

SMC
kstone803 is offline   Reply With Quote
Old July 30th, 2020, 09:49 AM #5
Pinecone Pinecone is offline
Senior Member
 
Join Date: Feb 2013
Posts: 21,956
Pinecone Pinecone is offline
Senior Member
 
Join Date: Feb 2013
Posts: 21,956
I use normal dies, and the only issue I have ever had was one rifle that needed the shoulder bumped a bit more than I was doing.

IMO, Small Base dies are for IF you have a problem, then get and use them. Otherwise, normal dies are fine.

My normal die reloaded ammo gauges perfectly. So they meet SAAMI standards.
Pinecone is offline   Reply With Quote
Old July 30th, 2020, 11:26 AM #6
erwos's Avatar
erwos erwos is offline
The Hebrew Hammer
 
Join Date: Mar 2009
Location: Rockville, MD
Posts: 11,054
erwos erwos is offline
The Hebrew Hammer
erwos's Avatar
 
Join Date: Mar 2009
Location: Rockville, MD
Posts: 11,054
I use SB dies by default at this point. Had too many rounds that wouldn't chamber even after passing gauges. SB seems to fix that. I'm not going to toss my old dies out, but if I'm having chambering issues, SB sizer die is pretty high on the list of things I'm going to try.
__________________
Things I love: bullpups, mag-fed shotguns, Glocks-not-made-by-Glock, .458 SOCOM, 6.5 Grendel, giving my opinion
Things I hate: .40S&W, KeyMod, AR pistols with buffer tubes, anything with an arm brace, fad-of-the-day long-range calibers
erwos is offline   Reply With Quote
Reply

  Home Page > Forum List > Topics of Interest > Reloading


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:41 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
2019, Congregate Media, LP Privacy Policy Terms of Service