Range Report 3 fps deviation out of 6.5x47

[Prebanpaul]

Today while at the range, I chronoed a fellow shooters rounds. I was highly impressed by his deviation in FPS. 5 rounds chrono on my magneto speed and he had a 3 fps deviation in between his five rounds. He was shooting a 6.5x47. He was 2947-2950. I am around a 20 fps deviation. What are your usual deviations.

 

[JLR]

With all of our 6.5x47 and 6x47, less than 10fps ES and most times are right around 5 fps. Same goes for the 338 Edge.

 

[Dogtown]

I don't know if I'm suddenly getting better at making precision ammo (not likely) or 6.5x47L is a very forgiving cartridge - I'm getting single digit SD more frequently than I ever did with .308WIN.

 

[former naval person]

I'd prefer to think that it was a fluke...that is .1%...I'd bet that even the Magnetospeed isn't that accurate. Bell shaped curves being what they are, you hit the small end. JMHO

 

[bh-ltr]

my 308 loads usually end up in the 8-10 fps SDs.

 

[6.5x47]

My current load of 40.8 gr H4350, CCI 450 and 140 Hybrid is typically giving me 14 ES and 4 SD's. Typical sub 1/2 moa 5-shot groups @ 950 yds. Now if I could just get the dang thing sighted in properly to hit the center of the target instead of low right.

Alan

 

[Dogtown]

I should point out that switching from GM205M to CCI 450 make my groups collapse onto each other and my SD drop to single digits.

 

[BGE541]

I should point out that switching from GM205M to CCI 450 make my groups collapse onto each other and my SD drop to single digits.

I am not much of a group shooter but I starded using the CCI 450 and the consistancy at range has been stunning.

 

[Dogtown]

It was an almost religious experience for me having tuned a load using N550 to the point where it was shooting better than any of my other combos, yet I had a feeling my rifle could do much better than 1MOA. On a whim I switched to the CCI 450s and ran the same load and couldn't believe my eyes as not only was every hole touching, they were well overlapping.

 

[308Gunner]

I to am running in the 8 to 10 fps range with Varget and BR2s

 

[excaliber]

Just remember that just because your ES & SD is great doesn`t mean accuracy will be. Tried AR Comp in 308, Lapua brass, 175gr Berger, Pacnor barrel, Mcmillan stock, Jewell trigger, ES & SD were single digit but accuracy was terrible, 1 moa @ 300yds. Getting ready to try some H-4895 & Varget instead. I want my rifles shooting at least 3/4" at that 300yds or back to drawing board.

 

[Dogtown]

True, but SD & ES seem to be a good way to gage how uniform your loads are, both in component combination and handloading technique. But as you say, those parameters do not determine load accuracy.

 

[McCrazy]

Just remember that just because your ES & SD is great doesn`t mean accuracy will be. Tried AR Comp in 308, Lapua brass, 175gr Berger, Pacnor barrel, Mcmillan stock, Jewell trigger, ES & SD were single digit but accuracy was terrible, 1 moa @ 300yds. Getting ready to try some H-4895 & Varget instead. I want my rifles shooting at least 3/4" at that 300yds or back to drawing board.

Do you mean 3/4 moa at 300 yards? Not saying it is impossible but trying to get 3/4" consistently at 300 yards sounds like the path towards insanity.

 

[Bluejazz]

With all of our 6.5x47 and 6x47, less than 10fps ES and most times are right around 5 fps. Same goes for the 338 Edge.

How about your 260's?

 

[excaliber]

Do you mean 3/4 moa at 300 yards? Not saying it is impossible but trying to get 3/4" consistently at 300 yards sounds like the path towards insanity.

I mean 5 shot, 3/4" group @ 300yds.

 

[JLR]

How about your 260's?

Honestly, I have never had a .260 long enough to even work up a load for it.