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  #16  
Old 05-04-2017, 12:04 PM
doubs43
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Quote:
Originally Posted by NF1E View Post
The Lyman 1200 dps that I use is good to .1.
I usually double weigh my precision loads so the come out a bit closer.
As an experiment for .308 and 30-06 I have not noticed significant accuracy lose with even as much as a .2 - .3gr difference. Now seating depth and jump are a different animal. They need to be very close.
Thank you. I was using an RCBS 10-10 scale, running off a close load using an auto scale and then using the 10-10 to make each load precise.

Now I have a GemPro 250 electronic scale that measures to .02 (2/100) grains. It's a little finicky but it's improved my groups.

Yesterday I shot two groups in my .308 using 44.0 grains of Shooters World Match Rifle powder which is similar to AA-2520 and CFE223 and 155 grain Nosler Custom Comp bullets. One group was just under MOA and one barely over MOA.

After allowing the rifle to cool, I then shot a third group using 44.3 grains. It measured just under 1/2 MOA. Not sure if the .3 grains made that much difference but I'll be trying that load some more to see if it was a fluke or not.

Even more interesting are the two groups I shot with 9 cartridges a friend gave me to just shoot away. They were FC cases - 4 brass, 5 nickle - loaded with 42.0 grains of H-322 and 110 grain Sierra HP bullets. The first group of 4 brass cases went 2.5 inches high and 1 inch right. It measured .830". I adjusted the scope to bring the POI within an inch of POA and the 5 nickle cases made one hole measuring .530".

I'd never have believed that 110 grain bullets would shoot that well in a 1:10 twist barrel.... but they did. My rifle is a Savage 10 FCP-K and my scope is a 6.5~20X Vortex Viper. I'm still working with loads for it as I've only had it a couple of weeks.
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  #17  
Old 05-04-2017, 12:39 PM
NF1E
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It's all enjoyable.
The 110s have surprised a lot of folks. Being flat base, they will help your rifles throat last a little longer and not so tough on the shooter.
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  #18  
Old 05-04-2017, 01:22 PM
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I shoot the newer 125 gn Sierra MatchKings. They are HPFB. They were designed to support the lower speed 300 BLK. I use them with reduced recoil loads for the 308 and 30-06 and they are very accurate. Since I am shooting iron sights I cannot quantify group size. With my 1903A3 on a SR-1 at 100 yards, I shot in a match 300-21X. That was good enough for me :-)

David
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  #19  
Old 05-04-2017, 04:09 PM
NF1E
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Yes indeed. The Sierra 125 tmk is a very nice bullet. All my 30-06 rifles love it.



Semper Fi
Art
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