270wsm Reloading

[MarkA]

As mentioned earlier a powder change may be in order. I have had good results using bullet manufacturer data for any given bullet....... Someone here mentioned Magpro earlier.

Nosler 270WSM data for the 140 AB's,,,,,, note Nosler's recommended accuracy load.
http://static1.squarespace.com/stat...6/1371138543873/270-WSM-140gr_version-7-0.pdf

From Alliant RL 23 looks good as well.
(My personal first test load in any 270WSM with 140 AB is with RL 22 loaded up to about 3,150 fps from 24" barrel, but will have some temp sensitivity and lot to lot differences, but no more or less that imr4350).
Which makes me think that the new RL 23 load maybe THE powder as it has been phenomenal in the 7wsm with 140 AB's for me.

Alliant load data for RL 23 in 270wsm with 140 bullet.

140-gr Nosler AccuBond
Reloder 23
Fed. 215
OAL 2.810
64.6 grains
3141FPS

http://www.alliantpowder.com/resources/alliant/2015_Alliant_Powder.pdf

 

[nate9ers]

Ok for starters. how many rounds through this barrel? How long has it been since cleaning? How long are you waiting between shots and groups? Are these Groups being fired from sandbags? The horizontal spread of the last few groups fired is very interesting that is why I ask about how rounds are being fired. I would go to the 59.5 since it looks most promising and start a seating depth test. Start at .01 off, .03, and .05 4 shot each and see what you get. Before firing any more let us know how many rounds since last cleaning.

My gun was bought about 2 years ago and probably 200 rounds through it. Factory ammo shot about MOA, but at $70 a box where I'm from, reloading in the long run will be cheaper and hopefully more accurate. I've always cleaned the gun every 10 shots or so no matter what. When shooting I wasn't waiting too long between shots unless the barrel was getting hot. Shooting off a bech from a cheap vise. I don't think there is much for shooter error.

 

[nate9ers]

Now that I know where my lands are, I will load some rounds like you said .01 off to .05 off in increments.
That group is what I'd love to have. I need to get my hands on some mag pro. But it's scarce where I'm from.

 

[Capt RB]

bullets.com has magpro in stock ( just read my email) Best of luck

 

[MarkA]

I've always cleaned the gun every 10 shots or so no matter what.

I won't even test for groups unless the gun has had 5 to 10 shots thru, especially a factory barrel, would recommend not cleaning for 50 or so shots and see if being fouled tightens it up as I would expect it too.

 

[wnc-coyote]

Definitely stop cleaning. You will be chasing your tail forever unless you let it foul up a little bit.

 

[nate9ers]

I am going to load some rounds tonight at 59.5 grains and try different seating depths to see what happens.
I know the currently my rifle has 10 rounds through it with out a clean, so maybe I will sent a few more down range before testing anymore reloads.
Thanks for the help so far, I will post how it goes when I have a chance to go back to the range. Probably on Friday.

 

[tbrice23]

My order of Magpro will be here in a few days but I'm going to load some RL26 and 150 VLDs.
Might load some 140 VLDs and RL 23 while I'm at it.

I'll post my results later.

 

[MarkA]

My order of Magpro will be here in a few days but I'm going to load some RL26 and 150 VLDs.
Might load some 140 VLDs and RL 23 while I'm at it.

I'll post my results later.

On the right path, keep us posted as to results.

 

[wnc-coyote]

My order of Magpro will be here in a few days but I'm going to load some RL26 and 150 VLDs.
Might load some 140 VLDs and RL 23 while I'm at it.

I'll post my results later.

I have not ran any 23 or 26 through my wsm's yet. However I have been having a blast with 23 in my 243. I am running a 105 A-max at 3055 with 23 out of my 243. and the 7mm I have not Crono'd yet but am getting very good results with a couple very wide nodes with 168 ABLR and 26.

 

[nate9ers]

Finished work early today and went to the range today.
I had loaded 3 rounds each with different seating depths but with the same weight of powder (59.5 grains of IMR 4350).
Overall Lengths:
2.892"
2.882"
2.872"
2.862"
I forgot to grab pics of the targets and I left them in a friends truck. I will describe as best I can.
2.892" shot a 1" group with 2 bullets touching the same hole. The other was the same for elevation but 1" to the shooters left.
2.882" shot almost a 2" group in about an equilateral triangle.
2.872" shot about 1" 1/2 group with 2 bullets about 3/4" up and down apart vertically and one about a 1/2" to the right of the lower one.
2.862" had 2 bullets touching but not touching as tight as the 2.892" ones and the other shot was about an 1" 1/4 away from them.
Overall the groups were a little better with the exceptiong of the 2.882". The 2.892" group was about the best followed but the 2.862" group which is only 5 thou farther out than what I had been seating the bullets at.
Anyways my plan is to load 5 of the 2.892" and 5 of the 2.862" and send them down range to see how they look. Thoughts??
I could also seat the bullets closer to the lands as I am about .014 off of them with my longest round??

 

[MarkA]

With Accubonds I generally find best accuracy at .050 to .100 off of the lands. Take your best powder weight and load test batches at .025, .050, .075, .100 and yes even .125 off and test groups.

Find best seating depth. For hunting setup I do not want ANY bullet closer than .010.

 

[tbrice23]

On the right path, keep us posted as to results.

Loaded from 66.5gr to 68.0 gr of RL26 and 150 VLDs. Temperature here was 14°. Shot at 200 yards with 3-15 power scope.

Groups were all about .6 to .7 moa--- untill I reached
68.0 gr! 5 shots .454 MOA at 3214 fps.

No signs of pressure. Put into perspective 68.0 gr of
H1000 only got 3070 fps.

 

[MarkA]

Loaded from 66.5gr to 68.0 gr of RL26 and 150 VLDs. Temperature here was 14°. Shot at 200 yards with 3-15 power scope.

Groups were all about .6 to .7 moa--- untill I reached
68.0 gr! 5 shots .454 MOA at 3214 fps.

No signs of pressure. Put into perspective 68.0 gr of
H1000 only got 3070 fps.

Same kind of results I have gotten with RL26 in the 7RM with 140 AB's, very nice. Tracking it over temperature changes I see about .5 fps per degree on temp changes.

RL 26 will make speed in the light to mid weight bullet ranges.