270 win, 130 partition, w760

[idahohunter8]

Any body have any experience with this combo? I always shot IRM 4350 or 4831, but the nosler manual shows this as the fastest powder so I bought some. I do like how its a ball powder and it meters so much better in my scale.

Is it very Temperatue Sensitive?

Per the manual - If I can truly get 31-3150 with accuracy - Ill be HAPPY HAPPY HAPPY!

 

[Bonz]

Not directly related to W760, but thought i would share.

I did some informal temperature sensitivity testing years ago, and it was easy to observe that W748 (at that point in time, could be a newer formulation now) lost velocity at colder temps. Back in the day, I was neurotic about that kind of thing.

Put loaded rounds in the freezer overnight (in zip-lock bags), transported to shooting area in a cooler with ice, chrono'd them back to back with loads at outside air temp (70's) and the frozen loads gave lower velocity by 100-125 fps. Also proved true with WMR, a discontinued magnum rifle ball powder Winchester came out with in the 90's.

The main reason I liked the Winchster ball powders, in theory anyway, is they are said to have lower flame temp's and in the long run, less barrel erosion.

With that said, I don't put the round count downrange with my hunting guns where that would make any difference in a lifetime, IMO.

From a velocity standpoint in my 35 Whelen AI, W748 gives some great numbers. Seems to be a slower burning powder than what burn rate charts give it credit for, base on my experience when working up loads.

Anyway, use that W760 and enjoy!

 

[preacher]

Use a good magnum primer ( I like Federal 215M the best, but all are good) and work up your load close to the temp you will be hunting in. You can always check your loads in the winter/summer and adjust them if needed, mark them for that season use. I have never had an issue with 760, but I only used it in a .375 H&H with 300 Sierra. It was worked up in the summertime and I shot a cow elk with it below freezing, no problems. The only problem I had was that 300 Sierra was too soft, did way too much meat damage. I know 760 is used in most Winchester factory ammo and look how many hunters use the 270! Go for it Pard. Myself, in my one 270 BAR H4831/130PT was 3150 in a 22.5" BAR.

 

[Silent Sam]

By "fastest powder" I assume you mean it gave the highest velocity... W760 / H414 will work fine and it does meter well. WLR primers are hot enough. If I was using Federal primers I would use the magnum version. I never particularly worried too much about temperature sensitivity although I don't work up loads in the middle of the summer either.

 

[PJGunner]

I have not used W760 on my .270 but this just January I had my 30-06 loaded with W760 and the 165 gr. Nosler AccuBond and killed a nice fat cow elk for the freezer. The load was worked up during Tucson's very hot summertime with temps running 100 to 105 as I recall. Temps while checking the sights up at the NRA's Whittington Center were running in the mid to upper twenties when we started shooting and was maybe about 30 by the time we'd finished. At the sighting in, there was no change in the point of impact from the original sighting in at Tucson.
Kind of the same deal using W760 in a load for my .308 with 165 gr. Speer Hot-core, load sighted in at home was still spot on in the lower thirties up in northern Arizona.
On WMR, as someone has mentioned it, I've worked up top loads with WMR in the .270 Win. and .300 Win. Mag. I'm still playing with that powder in the .280 which is showing some promise. For the record, it plain sucks in the 30-06. Very very erratic. Anyway, loads in the .270 and .300 showed no noticeable change on point of impact up at Whittington with the same accuracy level as reached in Arizona.
I do realize that things may prove different for others, especially if temperatures are colder that the 25 degree level I was shooting at. Shots taken at game in new Mexico were made at temps running between 25 and 35 degrees as near as we could tell.
Paul B.

 

[preacher]

Oops, I forgot, I also used 760 in a .308/165BT in Del Rio, way back in June of '98 on my first Axis buck. My zero had not changed and the temp was 110 when I popped him at 230 some odd yds. So, below freezing to a Texas Oven... and PJs similar...if it is indeed sensitive, it doesn't seem to make any difference in the field. Now, R19 still gives me the Willies, in a compressed load in a magnum case. At 10deg it had lost over 200fps and groups were all over. when I pulled the bullets, powder column was a solid cake, had to scrape it out. It was fine in the 240W case though. I don't buy it since then.