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300 wsm questions/problems

 
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  #1  
Old 11-23-2010, 02:46 PM
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300 wsm questions/problems

I am having some difficulty with a 300 wsm. I am looking for powder recommendations. I have a Savage model 12 in 300 wsm, it shoots factory Winchester ammunition very well, and it really liked WIN 760, but I witnessed the temperature sensitivity of it first hand, in as little as 20 degrees going from a safe load to a load showing pressure signs. So that will not really work for me.

I am trying to use 180 accubonds, as this is more of a regular hunting rifle than a long range rifle. The bergerís and a-maxís shoot better for sure, but after reading a bit, and my own tests on wet newspaper, I do not trust them up close on game. It will not shoot flat base bullets well, so I wanted to see what other powders there were, I have tried: RL 17 with no luck, even with the a-maxís yes, velocity was higher, but groups were not good at all. H4350 and 4350 are okay, but do not group that well. Also, I have varied charges a bit, there is not a very big window for the wsm as far as charges go it seems, so I have exhausted that option, and as far as length, I am loading for magazine length, which with the accubonds, is pretty far off the lands, I did not bother to check, but they are not very close, the bergerís or a-maxes are much closer. What else should I be looking at? Also, the debate about primers has me wondering, I have been using cci 250ís should I switch to a 200 or a BR2? Perhaps? Any other bullet to try that is made more precisely or shoots better than the accubond, but will hold up? Thanks in advance.

what powder is used in factory winchester loads? is it proprietary or has anyone figured it out?

thanks in advance
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  #2  
Old 11-23-2010, 03:48 PM
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Re: 300 wsm questions/problems

I'm finding this caliber to be very tricky to load for. I have played with H4350 and currently use RL17. It is difficult to find decent loads. I have tried some of these accuracy loads of H4350 in the 61 to 63 grain range and it is just way to much pressure for Win. brass and my rifle. Right now I can keep 1MOA or less with 60grns of RL17 shoving my bergers .015" into the lands. I did find with a high pressure load of H4350 and 208 A-max they liked to be .100" off the lands. But that load I fired once and ruined the cases. So my goal is to find a slow powder (Retumbo, RL19, 22 and 25) that gives good case capacity and just deal with what ever the velocity is. As far as primers, I am currently using Federal 210's. I just picked up 1000 210M's for when my new barrel gets here. Hopefully that will work.

I have four firings on my brass right now working on the fifth right now. My current load has an ES of 10, SD 8 and velocity is an avg of 2896 from my 26" factory Savage tube. I have to bump the shoulders every time I reload. The one time I didn't, it shot very well, but extraction was difficult. I want to try some Mag Pro, but it is difficult to find in my area.

Tank
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Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

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Old 11-23-2010, 03:50 PM
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Re: 300 wsm questions/problems

Quote:
Originally Posted by timeless61 View Post
I am having some difficulty with a 300 wsm. I am looking for powder recommendations. I have a Savage model 12 in 300 wsm, it shoots factory Winchester ammunition very well, and it really liked WIN 760, but I witnessed the temperature sensitivity of it first hand, in as little as 20 degrees going from a safe load to a load showing pressure signs. So that will not really work for me.

I am trying to use 180 accubonds, as this is more of a regular hunting rifle than a long range rifle.
I have the Savage 16 weathermaster in 300WSM. It likes Nosler and Combined Technology 168 grain Ballistic tips, pushed by 60.1 grains of H380, lit by Remington Large Rifle Magnum primers.
I have tried the 180's, I've tried the 150's. For my application, I'm getting right in the ballpark of 3050 FPS, right at the edge of the "sweet spot".
I have yet to have a deer not be DRT (Dead Right There) or take a step beyond where I shot them.
Those bullets seem to cause catastrophic damage internally, don't blow out the backside of the animal (except coyotes), and I'm extremely happy with them.
The CT's need a little fouling before they really start shooting well, so I usually take 3-5 foulers at the start of the season, and clean it after the season's over.
Not exactly ideal, but it works for me.
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  #4  
Old 11-23-2010, 04:33 PM
CLW CLW is offline
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Re: 300 wsm questions/problems

My Tikka is picky with powders/charges but COL hasnt seemed to be a big factor for it. It has a detachable magazine so I dont have much room to get the bullet closer to the lands so I just loaded everything to 2.86" with the 180 Accubonds. I had no luck with RL 17 or 22 (still need to play with the 17 some more) but IMR 4350 works great in it. I get sub MOA groups at 64.5 grains and half MOA groups at 65.1 grains. I actually loaded some up at 65 grains (which is MAX Load!) and they grouped really well without much pressure signs then the next time I loaded for it I accidentally put .1 grain extra in the first case so just did that on the rest of them. Worked out great, seemed to actually tighten the group a tiny, tiny bit....... Havent ran it through a chrono but it the Nosler book says 3013 fps with 65 grains and that bullet.......... I am using CCI 250 primers and Winchester brass.........
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  #5  
Old 11-23-2010, 04:45 PM
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Posts: 202
Re: 300 wsm questions/problems

thanks for the responses so far, RL 17 did not work for me much at all, 4350 and h4350 both have the same "max" for me, "max" as in where I still have useful case life, that is at 63 grains, and I have gone down to 61 grains in .5 increments with both powders, and none really get much more accurate or worse whether it is any charge in that range, it shoots okay, not good.

like i said 760 produced the best groups, and seemed to be good velocity wise, but going from say 40 degrees during development to 60 degrees or a little more created a bit of pressure, so I kind of ruled that out.

I am now interested in like RL 19 or the Hybrid 100 v or varget, varget i know is not as temperature sensitive, or the VV powders, or ramshot, but they seem to be very hard to come by.

I assume no one knows what the factory loads use or it is a powder that is not available? seems like the factory loads had everything I wanted in my rifle anyway, but just too expensive.
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  #6  
Old 11-23-2010, 04:47 PM
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Location: Central Pennsylvania
Posts: 4,022
Re: 300 wsm questions/problems

Quote:
Originally Posted by CLW View Post
My Tikka is picky with powders/charges but COL hasnt seemed to be a big factor for it. It has a detachable magazine so I dont have much room to get the bullet closer to the lands so I just loaded everything to 2.86" with the 180 Accubonds. I had no luck with RL 17 or 22 (still need to play with the 17 some more) but IMR 4350 works great in it. I get sub MOA groups at 64.5 grains and half MOA groups at 65.1 grains. I actually loaded some up at 65 grains (which is MAX Load!) and they grouped really well without much pressure signs then the next time I loaded for it I accidentally put .1 grain extra in the first case so just did that on the rest of them. Worked out great, seemed to actually tighten the group a tiny, tiny bit....... Havent ran it through a chrono but it the Nosler book says 3013 fps with 65 grains and that bullet.......... I am using CCI 250 primers and Winchester brass.........
I have some very old IMR 4350. Have you found many problems with temperature effecting your loads and pressures?

Tank
__________________
Matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. [14] But small is the gate and narrow the road that leads to life, and only a few find it.

If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger

Friends don't let friends develop canonitis!-chucknbach

arguing over the internet is like the special Olympics....even if you win, you are still...special!
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  #7  
Old 11-23-2010, 05:19 PM
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Join Date: Feb 2010
Location: just east of memphis, tn
Posts: 61
Re: 300 wsm questions/problems

Over the past year I have shot 300 wsm exclusively. Over this time I have worked up a number of loads that will shoot well under moa and several under half. Almost all bullets have shot better with different powders. 165 accubonds and rl 19 hover between 1/2 and3/4. 168 bergers and vihta vouri n550 shoot well under 1/2 if I do my part. 190 bergers and 7828 shoot pretty well. I am currently shooting 185 bergers and n-165 and shot a .60" group at 200 yds Friday. The easiest powders by far have been imr 7828, rl 19, vihta vouri n550, n560, n165. I got great velocity with rl17 and everything looked excellent but the targets lol guess my rifle just doesn't like it. Also I tried 180 accubonds quite a bit and never consistantly shot less than 1 1/4 so I moved on to other things. One thing I learned is that the lighter bullets liked the quicker powders and the heavier ones like the slower ones. Hope this helps.
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