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Discussion in 'Reloading' started by deadend, Jun 16, 2009.
Could someone tell me the published accuracy load for the win 270 , sie 130 spbt and imr 4831 powder
"..the published accuracy load for the win 270 , sie 130 spbt and imr 4831 powder"
A lot of us would like to have that kind of accuracy info. Sadly, it seems the few guys who might know are keeping that data secret so the rest of us have to do our own experiments.
Guess it's a conspiracy...?
Not exactly sure what you mean by "the accuracy load" but I shoot 54 grains of imr 4831 with a 130g speer pspbt and cci large magnum rifle primers out a Savage with a 22in sporter barrel from the bipod that load holds 1/2" at 100 yards and better than I can shoot it at 300 (I regularly hit the 4" gong 4 for 5 and when I miss it's my fault from poor mechanics.)
Dont have a chrono so I'm not sure what velocity is but I'm dead on at 300 yards and it puts me 2.5" high at 100 yards.
Hope that helps
406PAT I have not done any handloading since the late 60s but back then when you bought a reloading manual it had starting loads all the way though to max loads and the accuracy load was somewhere in between and highlighted.so I thought this would be easy to answer. maybe it is not done that way anymore. thank you for your responce.
It is not necessarily in between slow and go.
In fact I find that most rifles respond to near max or max loads unless they have light barrel
contours and then lighter bullets are the trick.
Accuracy is based on many factors and the powder is just one of them.
My 270 Win liked IMR 4064 with the 130gr spitzer boat tails. I wanted it to like H 4831 but
If you don't reload I would try as many brands as possible,Hornady,Winchester,Federal,
J E CUSTOM
Work up to 57 grs.
IIRC this was a recommended load by Ed Matunas, and shot "tight as I can hold" in my 1954 Win. M70 (but this particular rifle slightly preferred the flat base 130 Sierras, rather than the boat tails).
I don't know about IMR 4831 but the most accurate load that I have ever found for the 270 Win. in about every rifle I have seen with almost any lead core 130 gr bullet is 60 grs. H-4831 Remington case and a CCI BR primer.
I think you will find more accuracy when you find the COAL your rifle likes best.
Most factory .270s have llooong throats to accommodate the 160gr class round nosed bullets.
Find the lands and back off the length to around .020"-.050" off, and work up the load from there. Keep your magazine length in mind.
My COALs are way out there now, but man does she shoot! More velocity with less pressure too.
Good luck, be safe and have fun.
I know you're inquiring about 130 grainers, but I have found an accuracy load with the 140 grain Accubond with 54.5 grains of H4350 and a CCI 200 primer seated to COAL of 3.355.
The rifle is factory A-bolt with a Timney trigger. My wife took a great bear with it this year.