Best steps to reducing variation in muzzle velocity?

Try a different bullet! I had a 308 and a 6mmBR that wouldn't shoot high BC brand X or brand Y - then tried some old SMK's and viola! 300yd groups shrunk big time. There is a reason SMK's have been around for many decades.
I also suggest getting a way to be more precise with powder.
 
chrismc said:
Try a different bullet! I had a 308 and a 6mmBR that wouldn't shoot high BC brand X or brand Y - then tried some old SMK's and viola! 300yd groups shrunk big time. There is a reason SMK's have been around for many decades.
I also suggest getting a way to be more precise with powder.
Click to expand...

Plus they are cheap.
Money is a limiting factor here, and if i was shooting bergers instead of SMKs,
I wouldn’t be shooting 150+ rounds a month.

And i suspect that more practice also contributes to better accuracy...
 
chrismc said:
Try a different bullet! I had a 308 and a 6mmBR that wouldn't shoot high BC brand X or brand Y - then tried some old SMK's and viola! 300yd groups shrunk big time. There is a reason SMK's have been around for many decades.
I also suggest getting a way to be more precise with powder.
Click to expand...

I've tried a few bullet types including Berger, Sierra (190 MK) and some Hornady offerings. I have a supply of about 700 of the 185 Juggernauts so I need to burn those up, but I am pretty curious to try the Sierra 175 TMK. Unfortunately, around here the 175 TMK are as much or only a couple bucks cheaper than the Bergers....

MartyK2500 said:
Plus they are cheap.
Money is a limiting factor here, and if i was shooting bergers instead of SMKs,
I wouldn’t be shooting 150+ rounds a month.

And i suspect that more practice also contributes to better accuracy...
Click to expand...

No doubt there is never enough practice, but the current results on target are mirroring the chrono data so that tells me its not just me.

I think I'll work on the annealing/neck tension and charge weight resolutions first. When I do have several rounds that are very nearly the same velocity, this rifle is easily sub-1/2 MOA.
 
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cbh560 said:
I've tried a few bullet types including Berger, Sierra (190 MK) and some Hornady offerings. I have a supply of about 700 of the 185 Juggernauts so I need to burn those up, but I am pretty curious to try the Sierra 175 TMK. Unfortunately, around here the 175 TMK are as much or only a couple bucks cheaper than the Bergers....



No doubt there is never enough practice, but the current results on target are mirroring the chrono data so that tells me its not just me.

I think I'll work on the annealing/neck tension and charge weight resolutions first. When I do have several rounds that are very nearly the same velocity, this rifle is easily sub-1/2 MOA.
Click to expand...

My setup may be one odd cookie, but SD did not equal in accuracy for me.
When I used to get the labradar out for every single shooting session, some of my best 300M groups of the day did not have the best SD.
And on target, i'd have 10 shots under 1/2'' vertical, with a bit less than 1.5'' horizontal.

When I powder, I have tweezers and add/substract a kernel of varget to get to my exact amout on scale,
FX120 did help for SD but didn't do miracles, on target it showed more promise than behind a chrono.
Never got to why it's that way, as long as it's shooting good I left the chrono behind at home for now, as I always avg 2700fps in the end.
 
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