.452 bullets through .451 chamber throats ?


PDA






chriske
March 13, 2013, 10:50 AM
To check if a particular bullet is sized OK for the intended revolver, I read that you should be able to push the bullet through the chamber mouth with finger pressure & it shouldn't fall through of it's own weight alone.

Now I got hold of a batch of .452 bullets.
I can't push them through the chamber mouths of my Ruger Blackhawk.

Can those bullets be that much over-sized that shooting them in that revolver might be harmful ?
Can they be more than .001 too big ?

If you enjoyed reading about ".452 bullets through .451 chamber throats ?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
mdi
March 13, 2013, 11:12 AM
If it's only .001", shoot 'em. Not enough resistance in sizing with the throats to make a rise in pressure. One thousandth of an inch ain't very much, and soft metal to boot! Even .002" won't hurt, just might get some leading on the cylinder face...

Trent
March 13, 2013, 11:18 AM
It isn't a problem, I shoot .452 jacketed through 45 ACP and 45 Colt pistols all the time, no issues.

mavracer
March 13, 2013, 12:14 PM
You might not get great accuracy and it might lead a little but it shouldn't cause any problems.

ljnowell
March 13, 2013, 03:02 PM
dont be so sure that the throats on your blackhawk arent undersized. Its pretty darned common on those.

blarby
March 13, 2013, 06:19 PM
Assuming this is for 45 colt........

Anything .452 - .454 is fine.

GLOOB
March 14, 2013, 06:37 PM
Not dangerous. If it fits in the chamber, shoot it. Now, if the cylinder throat < bore, you will not have much fun with cast bullets.

murf
March 14, 2013, 09:09 PM
or accuracy with jacketed!

murf

chriske
March 18, 2013, 08:34 AM
Thanks, guys !
Indeed it was for .45 Colt (should have mentioned that)
And yes, they are pretty soft bullets, I intend to load them according to swaged-lead bulet specifications.
Thanks again, all.

Walkalong
March 19, 2013, 08:54 AM
Check the throat diameters. If they are undersized you can ream them all to .4515. But, you might find the gun shoots just fine as is. Depends on the actual size of the throats. If they are undersized you will get a lot of leading no matter what you try.

glider1
March 19, 2013, 09:02 AM
Make sure the chambers are clean and try each one. You could slug the barrel and each chamber. Don't assume anything about the bullits or the gun, on the other hand if it shoots good why worry about it. It's when it doesn't shoot good that you start looking for a reason.

SlamFire1
March 19, 2013, 04:38 PM
I have shot both 0.452" and 0.454" diameter bullets in my USFA Rodeo, chamber mouths 0.452 to 0.453 and my S&W M625-9 with 0.452" chamber mouths.

I believe that the powder lot, primer, temperature of the day, cases, make more of an effect on velocity and probably pressure, than 0.002" in lead bullet diameter.



M625-9 Mountain Gun 4" Barrel


250 LRN (.452") Valiant 8.0 grs Unique lot 6/21/1993 thrown, R-P cases, WLP primers
25-Mar-07 T = 80 F

Ave Vel = 814
Std Dev = 24
ES = 72.81
High = 847
Low = 774.2
Number Shots 11
accurate

250 LRN (.454") Valiant 8.5 grs Unique lot 4.3/06 5471 thrown, R-P cases, WLP primers
25-Mar-07 T = 80 F

Ave Vel = 891
Std Dev = 17
ES = 61.31
High = 921.1
Low = 859.8
Number Shots 27
accurate


250 LRN(.452")Tenn Valley Bullet 8.5 grs Unique lot UN331 1989 , R-P cases WLP (brass)

16-May-09 high 83 F

Ave Vel = 908
Std Dev = 23.3
ES = 92.5
High = 965.3
Low = 872.8
N = 29

5 1/2" USFA Rodeo

250 LRN (.452") 8.5 grs Unique thrown, R-P cases, CCI300 primers
12-May-02 T = 80F

Ave Vel = 855
Std Dev = 16
ES = 59.91
High = 885.4
Low = 825.5
Number Shots 12


255 LSWC (.454") 8.5 grs Unique thrown, R-P cases, WLP primers
12-May-02 T = 84F

Ave Vel = 844
Std Dev = 33
ES = 117.8
High = 907.6
Low = 789.8
Number Shots 12

240 JHP Sierra (.4515") 8.5 grs Unique thrown, R-P cases, CCI300 primers
12-May-02 T = 84F

Ave Vel = 848
Std Dev = 54
ES = 146.4
High = 911.8
Low = 765.3
Number Shots 6

If you enjoyed reading about ".452 bullets through .451 chamber throats ?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!