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270 w/150g ssts

 
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  #1  
Old 07-17-2006, 08:22 PM
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270 w/150g ssts

I spent sunday morning at the range with my 270 win. I loaded up some 150g sst's with RL-22 and H-4831sc. Both powders have proven accurate with a couple other loads, so I figured I would stay around 56.5g-57.5g and go up in .3g. My OAL was 3.430", I used Win cases, and CCI 250's. The column on the left represents RL-22, 56.6g-57.5g. The middle column is H-4831sc, and I only shot 56.6g and 56.9g as that was a pretty horrible group. Velocities were as follows, starting with RL-22 and the top group of 56.6g. I did 4 shot groups. Very little wind, 100 yards, about 80-95degres.

group 1- 2957,2972,2983,2948 4th shot did not hit target???
group 2- 2961,2967,2968,2997 4th shot was the high flyer?
group 3- 2970,2972,2995,3004
group 4- 3010 3014,2972,3032
sidenote- at 57.2g, bolt was little harder to lift, plus there were shiny spot on the head of the case. So I'm thinking I'm running them to hot and thats whats causing the horrible accuracy. Keep in mind however, I'm shooting 57.5g Rl-22 or 4831sc with the 150g gameking and it shoots great, max load as well. Now for the H-4831sc velocity.

group 1- 2934,2889,2932,2909 4th was the high flyer, hot signs as well
group 2- 2948,2957,2931 3 shot group of 6 inches at 100 yards, think i'll stop there, pretty hot load
sidenote- I'm thinking the same thing with this powder. I'm thinking I need to back down and see what happens. I know the rifle will shoot the SST's, it shot the 140g SST THE BEST out of any bullet i've put through it so far, to bad I only had 20 bullets, so that gave an itch to try something else. Anyways, I would like comments or opinions/suggestions.

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  #2  
Old 07-18-2006, 09:49 PM
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Re: 270 w/150g ssts

I have found Reloader 19 to group very well with 150 grain bullets in a .270 Winchester. Good Shootin'
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Old 07-19-2006, 10:41 AM
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Re: 270 w/150g ssts

I shot 150gr SST in my Savage 270 and they were superb. My load consisted of H4831SC, CCI BR2 primers in LC69 cases.

The milder primer might be all you need to dial in your barrel. If not, just start at 55.5grs and work up. My guess is that right around 2875/2900fps (55.7 to 56.0gr)will be where your barrel likes this bullet.

How hot was the barrel after three shots?

Jerry
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Old 07-19-2006, 11:44 AM
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Re: 270 w/150g ssts

my experience follows Jerry's.

Switch to cci-200s and watch what happens. I load RL-22 and 140 Hornady SPBTs. Accuracy was just good w/250s and is really great w/200s
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  #5  
Old 07-20-2006, 08:18 PM
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Re: 270 w/150g ssts

Jerry- Thanks for the info. I will start at 55.5g this next go round, and go up to 56.3g or so. I will do so with both powders. I'll probly get to it this weekend, hopefully. Bear season is coming up and Im thinking I want to take it. I dont know if its the CCI mag primer or what. I used Fed 215 with all my other loads and it seems to shoot ok. I ran out and thought I would use some 250's I had laying around. I think I have a couple 200's as well. If the drop in powder doesn't do it, I might switch to the 200 and see if it makes a difference. It was already prety warm when I got out there at 9, I bet it was close to 75, the barrel does not take long to get warm. And I would sure hope you all would know me well enough by now that I wait at least a couple minutes between shots, this depending on the caliber and temperature. In this case I shot 4 shots in about 15 minutes and my barrel was pretty warm. To only wait 1 or 2 minutes would not have been nearly enough. Anyways, think I'll get to pulling the remaining bad loads and load up some new ones.
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Old 07-21-2006, 06:45 PM
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Re: 270 w/150g ssts

Am I getting this correct?? From what I'm reading you are trying hard to make the sst shoot good so you can use it for bear season?? I have experience with the bullet and whitetail deer. Probably 5 kills and all have been super explosive. The sst would probably be one of the last bullets I would recomend for a bear. There are way way better bullets out there for that purpose. I hope I'm reading the post wrong.
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  #7  
Old 07-21-2006, 08:01 PM
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Re: 270 w/150g ssts

No you read it 100% correct. I have shot 3 bears with lesser, and not 1 was with a premium bullet. All 3 were shot with a 25-06, 2 with the 115g btips, and 1 with a 117g sgk. They were all past 350 yards, 2 of the bears took 2 shots, the other took 1. I think a 150g sst out of a 270 is plenty for our black bear.
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