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Forum Index > Rifles general discussion > Reduced loads for 270WSM

Reduced loads for 270WSM

22 Jun 2015
@ 02:12 am (GMT)

Charles Brabham

Last year I purchased a Winchester 1885 single-shot rifle chambered in 270WSM to serve in the high desert and mountains of West Texas.

After some difficulty with the 28 inch barrel, I reduced the barrel length to 24 inches and have since been happy with the rifle's handling qualities.

I enjoy shooting the rifle so much though, that I began to be concerned about developing heat-cracking in the difficult and expensive to replace 1885 barrel, so I decided to look into reduced loads for 100 yard shooting at the local sportsman's club.

My knowledge at this point concerning reduced loads, especially in magnum cartridges, was severely limited. I expected to obtain poor accuracy and to experience ignition problems. - But I was wrong.

I tried the reduced loads using AA5744 powder listed in the Speer handbook. Using Hornady 130 gran softpoints, Winchester magnum primers and 25.5 grains of AA5744, I was pleased to obtain stellar accuracy with these loads that equate well to a 125 grain 30-30 load at 2100 fps.

Besides breaking my long-standing 'best 100 yard group' size of 3/8" obtained thirty years ago with a benchrest rifle, ( Best group is .310" for five rounds now) I have found these loads to be inexpensive and very pleasurable to shoot.

After 500 rounds of these, the borescope shows no discernible wear or heat damage to the barrel.

From a technical perspective, I must wonder if the WSM cases might be better suited to reduced loads than the full-length magnums like the 7mm Remington magnum, for example. The horror stories that I had heard about reduced loads in magnums originated before the WSM cases were available.

In any case, I have discovered that starting loads for the 270WSM closely emulate maximum 270 Winchester loads, and these also shoot very well. I intend to use these 'starter' loads in all hunting situations that do not involve very long shots or very heavy animals. - And rather than shoot dozens of full-powered rounds through my barrel for load development, I will simply use factory loads for the rare occasions where maximum velocity is called-for.

I have been so happy shooting the 2100 fps 130 grain loads for my weekly shoots at the sportsman's club that I thought that I would mention these to the shooters here. They are very pleasant and inexpensive to shoot. - The brass holds up very well with five or six neck-sized loadings before full-length sizing is indicated by difficulty in shoving loaded rounds into the single-shot's barrel.

Kind regards,
Charles Brabham
Alpine, Texas

Replies

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22 Jun 2015
@ 03:55 am (GMT)

Nathan Foster

Re: Reduced loads for 270WSM
Those loads would be very good for offhand snap shooting practice.
24 Jun 2015
@ 02:21 pm (GMT)

Charles Brabham

Re: Reduced loads for 270WSM
I enjoy shooting from the bench the most. In the interest of developing some shooting skill relevant to hunting though, I fire one third of my rounds standing up, off-hand.

Physical infirmity prevents me from utilizing the better shooting positions, so I try to develop my skill at shooting "up on my hind legs" as we say in Texas.

On a hunt I would have shooting sticks, but I practice without them. My favored targets are rocks visible on the 100 yard shooting berm. Most of them are 3-4 inches in size, about right for popping with an offhand shot.

My rifle, a Winchester 1885, was way too front-heavy when I bought it for offhand shooting with the 28 inch barrel. So out came the hacksaw and the muzzle crowner. At 24" inches it is still heavy, but the balance is much better.

Kind regards,
Charles Brabham
Alpine, Texas
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