Keith style bullet and the ruger new model blackhawk 44 spec

[theblackspot]

My barrel runs .429 and my cylinder throats run .432 and .433. I only have .429 and .432 sizing dies. which one would you say would generally be more accurate? sizing to .429 or .432? - thanks.

[Fowler]

Try them both side by side a prove what your gun likes, results from other guns and other situations may not prove out to have the same results as your gun will. Id bet on the larger one most likely but every gun a is unique and so you find out for yourself at the range.

[cherokeetracker]

+1 on what Fowler says,,,, Too many times people take someone else's word for something. Proof is in the Pudding,,, shoot first then answer questions.

[bradshaw]

Sizing die of .429" is awful tight for .44 Special or Mag, which groove diameters generally measure more than .429-inch. Your .432" bullet sizer should work fine. As Fowler correctly hints, only the target knows for sure. Good chamber-to-bore alignment and a smooth, concentric forcing contribute mightily to serious accuracy.
David Bradshaw

[BigBore44]

Try'em Both and let the gun decide...
Like mentioned no two guns are the same, even if they are the same model, caliber, barrel length etc. etc., they can perform completely different on target..
Besides, load development and testing is half (or more) the fun.


Good luck
BigBore44

P.S.
I'm betting on the .432

[Cholla]

I size all of mine .430 for an identical revolver and get superb accuracy. i.e. 6" @ 100 yds. Don't know the cylinder throat diameters, but I'll check.

[bradshaw]

Jan 11, 2016 13:51:47 GMT -5 theblackspot said:

My barrel runs .429 and my cylinder throats run .432 and .433. I only have .429 and .432 sizing dies. which one would you say would generally be more accurate? sizing to .429 or .432? - thanks.

.432 to .433-inch chamber exits are a standard of Ruger and Smith & Wesson forty-fours. My S410N "Silhouette Super" has such a cylinder. Groove diameter started at .428, now rests at .429-inch, similar to yours. This arrangement in conjunction with the Sierra 240 JHP propelled the revolver to championships with loads which include 23 and 24 grains/IMR 4227; 21/Hercules 2400, and 23 to 24 grains of 296/H110. Each of these winning loads ignited by a magnums primer, mostly CCI 350. 9The revolver, one of the first SBH's produced with 10-1/2" barrel, is a five-inch gun at 200 meters.

I suspect a proper cast bullet should approach or equal this accuracy. The point I wish to make, often we get hung up on one-thousandth inch here or there, without considering the organic nature of a revolver. Accuracy is built on a harmony of dimensions, not all perfect, some more critical than others.

The superior accuracy intrinsic to the .44 Special was passed on to its offspring .44 Magnum.
David Bradshaw

[singleaction]

Accuracy may depend on the pressure of your loads and the hardness of your alloy. A good rule of thumb is to match bullet diameter with cylinder throats to create a gas seale and avoid gas cutting/blow by. The bases of moderately undersized Bullets made from soft alloys, like wheel weights or 1/16 tin/lead, tend to obturate or "slug up" and create a gas seal in chamber throats upon firing with mild to moderate pressures. Undersize hard cast bullets get their sides melted before they enter the bore, which causes leading and poor accuracy. Bullets sized to match the chamber throat should not allow gas around the bullet, no matter what hardness the bullet is. Even the hardest cast bullets will easily swage down to bore diameter when fired, so don't let throat matched bullets scare you. While this is a rule of thumb, results may break the rules, bu I would start with matching throat diameter, if possible.
Matt

[jwp475]

I would start with the .432 sizer

[theblackspot]

thanks all for the replies!