Sizer for .223/5.56

[Down South]

I just got a mould from a MiHec GB for the 5.56. I have a Colt LE/Military AR chambered in the 5.56.
I really don't want to slug the barrel due to its small diameter. my question is what size sizer are you guys using that cast for the 5.56. I was thinking .225" My Lyman manual says .224".
I think .225" would be better.

What say you guys?

[Echo]

Off the top of my head, with NO experience casting for the .223, I would say that if it chambers, do .225. If it isn't reliable, size .224.

[Larry Gibson]

.227 with 225462 because that's what they drop at. .225 is pretty much standard though. Haven't cast any from my GB Mihec mould so I don't know what they drop at. If larger than .225 I will probably use my .228 sizer which actually sizes closer to .227 than .228.

Larry Gibson

[runfiverun]

i'm at 225 but so is my rcbs mold.
i don't get all worked up about being hugely oversized anyways.

[Moonie]

I use a Lee .225 push through sizer for my sons 5.56 upper, never had any leading in it but YMMV.

[45 2.1]

A couple of us having been useing a 0.226" sizer from Buckshot for quite a while now. Excellent results from it to................

[GabbyM]

.225" has worked great for me. .225" bullets still fit down my Wilson hand seater die. Which surprized me.

[L1A1Rocker]

I've been wondering the same thing. Glad someone finally asked. I had read someone was using .224 but after reading this I think I'll go with the .225.

[Jack Stanley]

I've used the .225" with very good results in two or three different rifles . It even works when I'm not using gas checks as long as I keep the powder charge down reasonable .

Jack

[kir_kenix]

I usually size .225 accross the board. A few rifles may like .224, and a few of mine like .226 a smidge better. One Highpower likes .228, another .230.

I have a Hornet that was chambered on a 22lr barrel that DEMANDS .224 if anything resembling a group is required.

If you are only planning on buying 1 sizing die right now, I would suggest .225.

[CWME]

I am in the .225 camp as well. Good place to start.

[1Shirt]

Have used .225 for years! However, recently acquired an old lyman push thru for 310 tool for .226. Works well, but is clumbsy, and ordered a .226 from Buckshot. Looking forward to getting it as soon as he finishes his vacation. Got a .267 from him not long ago, and it is just great.
1Shirt!

[fcvan]

I'm sizing my Lyman 225-415 to .225 which has worked well in my Ruger 180 model Mini 14 and my brother's Contender. Seating the little boolits was a challenge until I started putting a mild chamfer to the case mouth. No they seat smoothly and without shaving.

I recently started copper electroplating this boolit and sized them to .225 without gas checks. I have to take some test boolits to the range to see how they run. If they run without leading and reasonably accurate I might make a 65-70 grain plain based mold that I can plate to proper size. Frank

[Down South]

From the replys recieved, I believe that I will start out with a .225". I'll get Chris to build one for my Star.