270 WSM best combo?

[Rickster8800]

OK. So I have been through the forums and found a couple of posts concerning the 270 WSM. I am trying to work up a load for hunting season this year but there are still holes in the data I have. I have selected the 130gr Accubond as my projectile and will be using Winchester once fired brass. What I still need are 1. Powder. 2. MAX Charge and starting charge. 3. C.O.L. It seems that most reloading books/sites have their own opinions on COL and powder charges so I was hoping some of you with a little more experience than me could help fill in the blanks. I have access to several powders to work with. These include RE-19, RE-22, IMR 4350 and 4831, and Hogdon 4895 and Retumbo. The rifle is a modest Winchester Super Shadow. In this instance I am probably looking for accuracy first. Anyone have any suggestions?

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[308jk]

i have the same rifle, i seat 130 accubonds at 2.86 which is .01-.02 of the lands. my most accurate load so far has been 62.5 grains of imr 4350. max in noslers book shows 63...so i would work up to it just for safety. i am working with rl-22 now but havent found anything that beats the imr4350

 

[Rickster8800]

Thanks. The max load is what had me a little edgy. I have Sierras 5th and Lymans 49th. Lyman lists max for 4350 at 62 and Sierra lists max at 62.7 or something like that. Thought it best to ask around.

 

[ranger188]

I have had great luck with H4831sc and fed 215 primers with 130 accubonds, the Winchester brass on the other hand was horrible wouldn't recommend it. My load is at 65.5 grains at 3200fps. Coal I use is 2.860. I haven't played with seating depth yet to see what results I could get.

I have also tried IMR4350 and that showed promise but the H4831sc was the clear winner. I also tried Magpro very good velocity but bad groups.

Nosler manual shows max load of 66.5 for the H4831sc and 63.0 for IMR4350.. Work your loads up.

 

[wnc-coyote]

I have not loaded Accubonds but I have a very accurate load with 130 Barnes tsx and 130 Nosler BT. I have tried rl-19, imr 4350, and accurate magpro. So far the magpro is my goto for all loads I have tried because my largest velocity spread was 12fpsb. And imr 4350 is a little less temp stable. Out of my rifle 73.0gr with the BT's gives 3300fps. And 75.0 with the tsx give 3500fps. Using fed brass. Wlrm primers. And as far as col goes that is something you have to experiment with in your particular rifle.

 

[Rickster8800]

Ranger188 I have IMRs 4831. Does it behave much differently than the Hodgdon variety?

 

[CogburnR]

I was surprised to find that Retumbo worked as well as it did in my rifle. I used 69.5g of Retumbo, a 215 primer, and a 140g Accubond for 3100fps. Very accurate in my hunting rifle which normally isn't a bughole shooter(Kimber 8400).

I will have to say that the terminal performance of the 140 AB was poor compared to the 140g Interbond(or Sierra hpbt) I had been using. I put 3 shots into a sub 3" group through the heart and lungs of a nice Whitetail at close to 100 yards and none of them showed much expansion. In fact the exit holes actually were cleaner and smaller than the entrance holes and non were bigger than a nickle. I am used to up to fist sized exit holes so that experience pretty much ended my use of Accubonds(same reason I don't use ballistic tips).

Magpro and RL17 is good as is 4831 and 4350. H4831 is more stable than the others though.

 

[Salar600]

On my side I had best accuracy in my T3 with:

Win cases
WLRM primer
150 SST- 1st H1000
140 SST - W780
130 SST - W780

Mart

 

[65WSM]

I am interested in long range hunting. The 140 gr Accubond in .270 has a BC of nearly .5. The only competitive bullet is the 140 Berger Hunting VLD. The 150gr Ballistic Tip has the same BC as the best 140 gr bullets but will never start out as fast. To shoot a higher BC bullet you will need a steeper than normal 10 twist barrel.

MagPro produced 80 to 110 fps (barrel length) than any other powder I tried. I have tried VV N-560, Alliant 4000MR, Reloader 25 and Retumbo. 74gr of Magpro would get to 3300 fps in a 28 inch barrel of a 1885 falling block. The other powders were closer to 3200 fps. Let me know if you have found a powder that produces more velocity than MagPro.

 

[bigngreen]

I am interested in long range hunting. The 140 gr Accubond in .270 has a BC of nearly .5. The only competitive bullet is the 140 Berger Hunting VLD. The 150gr Ballistic Tip has the same BC as the best 140 gr bullets but will never start out as fast. To shoot a higher BC bullet you will need a steeper than normal 10 twist barrel.

MagPro produced 80 to 110 fps (barrel length) than any other powder I tried. I have tried VV N-560, Alliant 4000MR, Reloader 25 and Retumbo. 74gr of Magpro would get to 3300 fps in a 28 inch barrel of a 1885 falling block. The other powders were closer to 3200 fps. Let me know if you have found a powder that produces more velocity than MagPro.

I shoot the 165 and 175 Matrix and they are fully stable to 2000 yards at 5600ft elevation with a 1-10 twist, the 165 is fully stable in our 270 wins also. Lots of guys shooting the 165 Matrix at much lower elevations in a 1-10 twist. They are worth a try for the increased performance past 800 yards.