Ruger 480 / Win 296 / Chrono Results

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Gary H

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I'm not promoting these loads. I'm just reporting results through Super Redhawk 7 1/2". Your mileage may vary, so approach with care:

Hornady Brass (from factory close to 1.275")
Leadhead PP48-355 WFN .476"
Win 296
WLP Primer
Heavy Rolled Crimp
COL: 1.665 - 1.668

25 gr. Win 296: 1259 fps / S.D.:16

26 gr. Win 296: 1316 fps / S.D.:13
 
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So, how do I know if this is where I should stop? Is it just a matter of looking for signs of stress? That seems to be a rather risky way of determining the maximum safe load.
 
What did the load data call out for a max velocity with that bullet weight and powder and primer and length? THAT is where you need to stop, going further is something best left to reloaders a little more adventurous with LOTS of experience IMO.

What was the bullet weight, 355?
 
Bullet weight was 355 gr. and there does not exist load data...not that I could find..
 
GaryH,
this data is from the Hodgdon website and shows that you are very close to maximum pressures for the cartridge. This is for a 325 grain jacketed bullet but if you look at data for 370 grain lead bullets there is a drop in the powder charges from this load.


325 GR. HDY XTP(Starting Loads)
DIA. .475
COL: 1.620"

H4227 24.0 1295 32,600 PSI

H110 25.0 1416 37,300 PSI

LIL'GUN 22.5 1416 39,300 PSI

LONGSHOT 13.0 1217 38,800 PSI

TITEGROUP 9.0 1016 34,900 PSI



325 GR. HDY XTP (Maximum Loads)
DIA. .475
COL: 1.620"

H4227 27.2 1477 45,600 PSI

H110 27.0 1518 44,900 PSI

LIL'GUN 25.1 1525 45,200 PSI

LONGSHOT 14.5 1330 47,000 PSI

TITEGROUP 10.7 1158 46,200 PSI

You might be able to increase your load by 3% or so (.8 grains) but if you do work it up in .1 grain increments while monitoring primers and case extraction closely. WW296 and H110 are the same powder according to Phil Hodgdon and their data is interchangable.

You did not report your group sizes - if you are getting good groups it might be a good place to stop - with lower pressures cases last longer and so do you.

PaulS
 
PaulS:

Thanks, the Hogdon site was my source for the load that I put together. I was a bit iffy on a try at 27 grains with the 355.
 
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