conflicting info re. IMR4320 for .303Br

[louthepou]

Hi folks,

Despite my best efforts, with the charts I found on the Web, I'm having trouble getting consistent info re. the min and max loads of the powder IMR4320 for a 180gr bullet (for my .303 British round). Anyone has some data they could share with me? The reloading books I have didn't help.

And if the info for a 150gr bullet isn't too far too, that'd be the ideal scenario...

Thanks in advance,

Lou

 

[gunbug]

I think there is a websight called .303british.com or similar. I ran across it before had a lot of info on it. Dan

 

[Winnipeg Toymaker]

My Lee reloading book does not list IMR 4320 as a powder used in .303. The Hornady has 2 listings:

IMR 4320 ...150 gr Spire...2400 fps...40.4 grains...2600 fps max.44.1 grains
IMR 4320....174 gr Rnose...2000 fps..34.3 grains...2400 fps max. 41.5 grains


Hope this helps....My BIL has given me loads for H4350...46 gr. for 150s. but better for .303 is 150s with 40 grains IMR 3031. he has tried them all.

 

[louthepou]

Thanks gunbug,

Thanks WT!

Lou

 

[Ganderite]

4320 seems to change speed from lot to lot. Start low and work up to a load that groups well.

 

[manitou210]

My Lyman #48
IMR 4320 180 sierra start 37.5 at 2046fps/max Imr 4320 41.5gr at 2309fps

There accuracy load with 180 sierra's Varget 41.7 2307fps
and reloader 15 42gr at 2376 fps
hope this is some help
manitou

 

[Beater]

my load with the 174 MK is 37.5. gave me 2450 over the crony