lee mold c-312-185-1r

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Ed Harris posted this 29 November 2010

Have not used this particular mold. In general to maintain normal accuracy, if sizing a .313-.314 down to .310-.311 for use in normal .30 cals, I recommend doing so in two steps, first an intermediate size, then to final diameter. You want to push the bullet into the die nose first to avoid bending. Lee can custom make a .312 push-through die as an intermediate step which works well before final sizing. Their standard sizes jump from .314 to .311, then .309. You could use a regular Lyman or RCBS sizer, but doing so will form a small flat on the bullet nose. This works OK if you will use the bullet for hunting, etc., but I would not expect match target accuracy with such excessive sizing.

73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia

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Wayne S posted this 29 November 2010

I'll call this “another way to skin a kat", when going from .312 -.314 down to .309-.310, I run the bullets through a Lub sizer applying the GC & lube with a .312-313 H&I die, then run them through a Lee .309 or a custom .310.

Honeing the Lee push through dies is easy, and the custom dies can be had a lot quicker than dealing with Lee

What does your chambers throat mike ??

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LeÃƒÂ³n posted this 05 December 2010

I use the Lee C312-185-1R, sized through a .312 H&I die, for my .308 Win in preference to the Lee C309-180-R as its nose fits the bore better, yet with adequate chamber neck clearance. I find better 200 yd accuracy which I attribute to the better nose support by the bore. With WW my mold may cast small with for your Mark 4 chamber and the nose might not fit your bore but a .313 H&I die does kiss the bands. For the 30 Cal applications you mentioned, sizing through a .311 die may not be excessive.

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evergren posted this 06 December 2010

thks for the replys just found out it will take up to 12 weeks to get the mold here in saskatchewan. will be going to florida in feb so will look for it there.

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The Black Spot posted this 13 June 2012

My lee 312-185 does not do well in my mark 4, but that is because my bore is .315 :shock:

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onondaga posted this 13 June 2012

http://www.castbulletassoc.org/view_user.php?id=4861>evergren:

I also tried a string of loads with Hodgdon H380. My rifle did not like that powder and at best was 2.5 inch groups at 50 yards with 39.0 grains H380 (~2180 fps) .

I may use this bullet deer hunting and plan on re-trying the bullet with hollow pointing, using my Forester hollow pointing tool and drill press on loaded ammo to see how the C312-185-1R shoots when hollow pointed. If it still groups 1” at 50 yards, I will use it. If not I have another bullet that is a 170 gr FNGC that shoots well out of the 1903A3.

Gary

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Axel posted this 29 October 2012

I use it for my Mosin Nagant. They drop at .314 to .315 and I size them to .314. They're pretty accurate.

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grouch posted this 29 October 2012

I used it in a mark 4 with 17gr of H110 - results about equal to ball ammunition. Also shot it in a 30 30 sized 311 with good results and no sizing issues. Lee push through die. Grouch

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72coupe posted this 29 October 2012

I shoot it sized to 310 in my Remington 40X becuase it has a 1 in 12 twist and will not stabilize the 314299 that I shoot in everything else.

It does shoot well in my 40X.

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Bob S posted this 01 November 2012

That bullet works well in just about any US .30 cal rifle I have. In this 03A3, two consecutive 5 shot groups fired prone (not rested) at 100 yards. I think you can read the data.

Resp'y,

Bob S.

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joeb33050 posted this 01 November 2012

72coupe wrote: I shoot it sized to 310 in my Remington 40X becuase it has a 1 in 12 twist and will not stabilize the 314299 that I shoot in everything else.

It does shoot well in my 40X.

Please tell the symptoms of not stabilized-range and what happens etc. Thanks; joe b.

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72coupe posted this 01 November 2012

Joe the holes are oblong at 100 yards.

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tturner53 posted this 01 November 2012

The 314299 does the same thing in my CZ 550 FS with a 12” twist. I'm going back to something shorter/lighter in the CZ. It seems to me some long/heavy bullets will shoot straight in one 12” twist rifle and then go haywire in another with identical twist. I do have the tumble lube version of the Lee mold and will try that in the CZ. With the fat nose though it may not chamber unless seated pretty deep. One way to deal with a slow twist and long bullets is to boost the velocity, gets the rpms up.

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CMP Shooter posted this 08 January 2013

Does anyone know the approx. dia. of the nose for the lee mold c-312-185-1r? I'm not getting good results in my Argentine or Brit Enfields using the 314299 and I suspect the nose may not be large enough to ride the bore correctly.

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onondaga posted this 08 January 2013

Nose diameter just ahead of the first bearing band measure .300-.301” on mine, the ones pictured above, cast in #2.

Gary

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72coupe posted this 08 January 2013

The nose diameter of my 314299 is 303. In my 1903A3 the rifling engaves the bullet its full length to where it angles to the point.

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CMP Shooter posted this 08 January 2013

onondaga wrote: Nose diameter just ahead of the first bearing band measure .300-.301” on mine, the ones pictured above, cast in #2.

Gary Thanks Gary. I'm looking for something that drops at least at .303 as most of the bores I measured are approx. .302. I've loaded up some ammo using the Lee 312-160 to try as an experiment. I measured my 314299 boolits and they dropped at .3015 just ahead of the first band.

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frnkeore posted this 13 January 2013

This is a little different Lee 160 gr (#90367)that I made into a spitzer. It's .980 long. Cast of 22/1 lead/tin it casts .309 I put the GC on in a .310 die and breech seat it in a .309 freebore, 30/40 chamber in a High Wall. The case is a reduced capacity case that is solid brass with a .312 reamed hole back to the primer pocket and has a case capacity of 2.8 cc's.

The load is 8 gr of Unique, 1323 fps, ES 5 fps. 100 yard group of .330.

The other bullet shown is a NEI thats 1.230 long and will stablize in this 12 twist, 26” long A&M barreled rifle at 1450 - 70 fps. I can stablize bullets that are 1.160 long in my 14 twist Douglas barrel. Almost all my loads are breech seated.

Frank

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Ken Campbell Iowa posted this 14 January 2013

THE SOLID CASE/straight drilled IDEA IS JUST THE SAME AS ONE ( OF TOO MANY ) PROJECTS OF MINE ...MINE IS WITH LATHE TURNED SOLID 45-70 CASES .... ooops

what primer are you using?

ken