Reloading the .270


September 23, 2009, 12:25 PM
Ok so I am reloading for .270 for this hunting season but have not figured out what powder I want to use. And yes i am fairley new to reloading so it is going to take me a while to get the right mixture. Anthow I am using the 150gr. Gameking from Sierra and shooting from a .22 inch barrel. Any sugestions?

If you enjoyed reading about "Reloading the .270" here in archive, you'll LOVE our community. Come join today for the full version!
September 23, 2009, 12:35 PM
H-4831, IMR-4831, IMR-4350.

There are some slower powders yet that will possibly give higher velocity, but muzzle blast will get kind of fierce in your 22" barrel.

Lyman #49 shows the potentially most accurate load using a 150 Hornady with H-4831, so that would be a good place to start.


September 23, 2009, 12:42 PM
IMR 4831 is the "traditional" powder for .270. I personally use H-4350 because I have a lot of it on hand for my .30-06 loads. Using 130gr Speer's, I've had MOA performance with H4350. My father has always used IMR 4831 with Sierra 130 gr bullets with excellent results.

A friend of mine likes the Reloader powders in his .270 but I've not had any experience with them.

September 23, 2009, 02:10 PM
I've owned, loaded, fired, and hunted with several 270 Winchester caliber rifles for about 50 years. I have found that most are most consistantly accurate with 150 gr. bullets, usually Sierra or Hornady. One problem I experienced several times was that 150 gr. bullets shot clear thru mule deer at ranges to 150 yards. I've taken deer at longer ranges with the 270 and never had a problem. When I quit hunting elk, I dropped down to a 130 gr. and never had a bullet pass thru a deer, PERFECT!!
When I was using the 150 gr. it was because deer and elk season ran concurrently.
The 270 is great and can be nearly perfect with judicious handloading. I found Winchester 760 to give me best accuracy and velocity in a 22" Model 70---3140FPS at 10' in Military DEN 43 reformed cases. No pressure signs and easy extraction. Best 270 I owned and shot the throat out of the barrel in a few thousand rounds. Oh well!

Ol` Joe
September 23, 2009, 06:46 PM
R22 and H4831 in that order with any wgt from 130 to 150 gr.

September 23, 2009, 07:42 PM
Thank you guys for the info. MMCSRET that is why I am using the 150gr bullets here in the Bitterroot deer and elk season are together. Thanks guys.

September 23, 2009, 09:23 PM
Yup!!! I first started using a 270 in the Bitterroot in 1957. It was a Husquevarna(sp?) FWT with a Weaver KV scope in tip off mounts. Did the job!!!!

September 23, 2009, 09:32 PM
why dont you want the bullet to pass through?I think that would be what I would want better blood trail

September 23, 2009, 09:59 PM
56.0 gr.H4831 with a Speer 130 gr. BTSP has never failed me with a full pass through and an excellent and short blood trail.

September 23, 2009, 10:18 PM
Reloader 19

September 23, 2009, 10:35 PM
I don't want a small caliber bullet to pass thru because its not enough of a blood trail. A 44 or 45 cal. hole I like, but I want a bullet like a 270 to stay inside expending all energy doing internal destruction. I have never won a foot race with a wounded deer or elk. Some of the country I used to hunt in Western Montana was so straight up and down that even a horse was a hinderance until it came time to move the game out. I was back in Central Idaho and it took two of us with one horse two days to get an elk to the trail head so we could get at it with a jeep. I don't want to track more than a few yards in that steep country with the pockets of black timber that is so over grown the rabbits go around it.
Chalk it up to personal preference.

September 24, 2009, 06:05 AM
quick load suggests a MAx load of 52.5 gr of imr 4350 will give a velocity of 2863 from your 22 inch barrel, 99. something % powder burned.

55 gr imr 4831 is very similar. but 100% burned.

49 gr imr 4320 gives 2812 fps. all burned much sooner (maybe one i would consider)

48 gr imr 4895 gives 2844.

these cases are not 100% full. If you look for a powder that will 100 fill your cartridge (supposedly better accuracy) then it will be slow burning and flash like crazy. I reckon i would use H4895.

of course these are theoretical maxers and you should start low and work up


51gr h380 gives 2809 (98% Burned)

If you enjoyed reading about "Reloading the .270" here in archive, you'll LOVE our community. Come join today for the full version!