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View Full Version : New guy needs info on correct size for .327 Federal Magnum



Arceagle
01-02-2012, 12:06 AM
Hello, I'm new to this forum and even newer to casting. I have been collecting some equipment and reading lots of forums, but I would like a knowledgable opinion before ordering a sizing die for my Blackhawk in .327 Federal Magnum.
The cylinder throats measured .3145 with all throats being very close on all measurements. The barrel slugged a very tight .312. I have a NOE die ordered from their in stock dies for a RF GC .314. Any help would be appreciated. Thanks.

Where do I need to post these questions?

Are there still forum members selling lead?
Does anyone load for the .327 Fed mag?

runfiverun
01-02-2012, 12:34 AM
i'd see what size the mold pours before i ordered a size die.

Mk42gunner
01-02-2012, 03:15 PM
Wellcome aboard.

.3145"? That seems pretty big, how did you measure it? If your throats do in fact measure that large, conventional wisdom would be to size your boolits at .315"; but you need a mold that drops larger than that.

I would see what your mold drops at first, no sense trying to size a boolit larger than it already is. I might even contact Ruger to see if the throats are within their specifications.

I don't load for the .327, but do load for the .32H&R with .313" boolits. The throats on my SSM are .3125" with the barrel at .312".

Check out the swapping and selling forum for lead.

Robert

Guesser
01-02-2012, 05:45 PM
I cast a 311316 that drops on the large side of .313, I size it .313 and use it in two different 327 revolvers. I tried it before I slugged, measured, gauged or any other precise determination. It works very well; just lucky, I guess.

rintinglen
01-02-2012, 07:17 PM
.313 works for me, but based on your info, I'd say you will get best results with an honest .314 boolit. I'd seriously consider one of the group buy molds in .316 diameter and run it through a .314 sizer. Should be just about perfect.

Arceagle
01-02-2012, 09:11 PM
Thanks for the imput guys. I think I'll go back and check my measurement techniques on the cylinder. The barrel was easy to check, because I had some Hollow based watcutters large enough to drive thru the barrel.
The cylinder on the other hand was not as easy, the only lead I had close enough to the right size was some 00 Buck shot that was just a little over .32. I'll recheck as soon as I get a chance and repost, Thanks.

contender1
01-02-2012, 11:08 PM
I load some for my 327. However, my cast boolits were a gift. I haven't been able to cast any yet. I'm on two group buys for two different boolits for my 327. I'm gonna wait to see what they drop at, and then I'll know where to size them to match my gun.

leftiye
01-03-2012, 05:57 AM
My 327 needs .314" boolits too. S&W model 16 with lengthened chambers essentially. Don't flame me about making it a .327, the chambers were .100 overlong anyway. What the gun you are making ammo for measures for chamber mouth, and bore/groove is all important. What someone else's other gun measures don't mean squat. What the caliber should measure means nothing either ('cause yours don't measure that size anyhow).

VA Shooter
01-03-2012, 11:21 AM
My lyman 311008 drops .314 and shoots well in my GP 100 there is a lot of different loads that you can try for the 327 if you need any data let me know

TJF1
01-03-2012, 11:33 AM
My bh measures .312 on the throats. I size at .313
using an old lyman mould 311316 gc. It shoots good in
my bh, sp101 and my charter arms. Also the lee 311-100-2r
works good
terry

lbaize3
01-03-2012, 02:19 PM
I shoot .313 gas checked 115 grain boolits in both my Ruger and Taurus pistols. Accuracy is excellent.

mdi
01-03-2012, 03:18 PM
If the throats are .3145" then I'd size to .3145". May be difficult to get that .0005", so just go for .315". Shouldn't be a problem with a .312" groove diameter.

Arceagle
01-03-2012, 03:29 PM
I am off work today so I reslugged all of the cylinder throats on my .327 Blackhawk. Seven out of 8 are going to be on the big side of .314. Not all the way to .3145 but they are a little more than .314. One cylinder I slugged and measured 3 times and it's closer to .315 than it is to .3145. I'll just have to shoot it and see if it is going to hang in with the rest of the shots. I am a little concerned that if it's too much overbored it may cause leading. If it gives me any trouble I'll just leave it empty.
But back on topic it I guess I am going to have a bullet that is at least .315. Is that going to be too much for a .312 barrel? Will it cause excessive pressure?

PS: The buckshot I used made what looks like some neat little 45 gr. bullets after driving them thru the cylinders, If they they only had a grease groove.