Ran another ladder still can’t seem to find a clear path forward

[StumpGrinder]

You say you grew up in sedan you old enough to have known Harry Kerr. David

I left there in 1980 when I joined the Army, I've visited since then but it's been about 17 years. Those names are not familiar.

 

[Philward]

For a hunting rifle I would just load group 6, unless you just want to burn some powder and bullets for fun.

 

[PowellSixO]

Horizontal grouping is wind, a 150 grain 308 bullet moves about 2" at 100 yards in a full value 10 mph wind. I know you said the wind was less than 10 mph but unless you are in a wind tunnel they are not sustained at a given value. You may break one shot at 2mph and the next at 5 mph. Pressure has a direct effect on velocity. Neck tension, seating depth and powder charge variations will more likely give verticle stringing. If this is a hunting load 1 moa should be good enough for ethical ranges.

Powder charge absolutely has something to do with vertical stringing. No one thing has everything to do with a single symptom of bad grouping.

 

[david g ranes]

I left there in 1980 when I joined the Army, I've visited since then but it's been about 17 years. Those names are not familiar.

He's dead now i knew him in 1981 used to fish at Toronto he worked for same oil company I worked for. David

 

[Tommo64]

I would be doing a seating depth test with the 71.5gr charge.

 

[pony doctor]

Shot is wind less than 10 mph. From a bench with sand bags. Last group on bottom left was sighting a different rifle. But they are in order left to right, top to bottom. Starting lowest charge working to highest. 4 min between shots for barrel to cool. Started with a clean barrel

Been there!
Short checklist;
1:Check all mounting screws of your scope (hope it is a high quality one!) and / or just for fun, try mounting a different scope.
2: Try another brand of bullet. ( had one that would not shoot particular bullet)
3: if still cannot locate the " sweet spot" try another powder

 

[L.Sherm]

If this is a hunting load 1 moa should be good enough for ethical ranges

I've seen 1 m.o.a at 100 turn into 10" at 500.
Whats ethical?

 

[Deputy819]

 

[HOCOMO Hunter]

I just burnt up 200 bullets and 2 lbs of powder chasing the same thing. Curiosity what is the rifle? I found my problem after 200 rounds

 

[L.Sherm]

I just burnt up 200 bullets and 2 lbs of powder chasing the same thing. Curiosity what is the rifle? I found my problem after 200 rounds

We've all been there

 

[J-B welder]

I am in Sedan Montana. A little place North of Bozeman, MT.

That's funny. I figured it was a joke about being a cowboy who drove a sedan. Just goes to show......something, I guess, not sure what.

 

[Randy dawson]

I just burnt up 200 bullets and 2 lbs of powder chasing the same thing. Curiosity what is the rifle? I found my problem after 200 rounds

It's a browning hells canyon max long range.

 

[HOCOMO Hunter]

Well after 200 rnds on my wilderness terrain I found out my factory muzzle brake only had .004 over bore. Everywhere I've read .020 minimum, they were quick to send out a replacement we'll see how it affects it.

 

[Randy dawson]

Personally I don't know what your markings on target refer to...but I'd be focusing on 6-1,2,3,4 or 8-1,2,3,4

That's the group number and shot. So I could
Match it to velocity