Can somebody esplain dis to me

[UNCLEHARLEY]

I'm new to reloading with these results.
308 Win AR10
#1 Hornady ELDM 155 gr
45 gr Varget
50 yds 3 shots1/2" group, 1/2" low
100 yds 3 shots 2" group, 2" high

#2 Barnes TTSX 150gr
45 gr Varget
50 yds, 3 shots touching in bullseye
100 yds, 3 shots 1" group, 2" high & 3" left

I've tried 44gr & 46 gr loads with worse results. I'm just a deer hunter & occasional range shooter. I hunt mainly woodlots so a shot over 100 yds would be rare. The results above are ok but looking to improve if possible. I don't understand the movement left of the TTSX at 100 yds.

 

[mr45man]

Try shooting at 100 without dialing the scope from 50 yard to 100.

 

[PigButtons]

More info makes it easier to get help. Are you shooting off of a rest, a bi-pod, a rolled up towel? Rear bag? Are you adjusting the optic/sights to zero each load? Are you using some standardized method of working up your loads? Scope, red dot, open sights?
We love to help around here, but we need more data points.

 

[wedgy]

Monos such as the Barnes do different things sometimes and I have had them creep horizontally with increasing powder charges. Barnes are sensitive to seating depth and generally like at least 0.050" jump so try deeper if you are at mag length. Hammers(another mono) are not very sensitive to seating depth and will give you more speed than a comparable weight Barnes.

 

[joshb]

Might be a loose scope or a bad scope. What gun? How are you shooting it?

 

[dfrosch]

Are you using a scope? What kind? Got a level on that scope?

Parallax could be part of the issue. Work on your cheek weld, breathing, trigger control and holding the rifle level.

Always sight it in at the furthest distance you would shoot. Any errors would diminish at shorter distances.

 

[LVLAaron]

I'll add.... AR10's are PICKY. They are battle rifles unless you put a very quality barrel in them.

 

[searcher]

I have gotten overzealous finding the "perfect" load for big guns shooting big animals. If you don't anticipate going past 100-150 yards, I'd stop right now and take your pick between the two and use your newfound extra ammo as practice ammo shooting from positions. My current 7 MM Mag took 1,100 rounds before I was happy - then I decided to use a different rifle......

 

[divingin]

Are you concerned about the elevation, or the groups?

Elevation sort of makes sense (without doing the math), as the scope is above the line of the bore, so for them to look at/hit the same point, they are not parallel. This means that for a close zero, the bullet is launched upwards to a degree compared to the scope. Move further out, and the upwards trajectory continues (until gravity overcomes that.) Shots will end up higher until the bullet tops out in its arc.

As far as groups, not sure there's enough info to come to a conclusion. I will say that, for me, 100 yds (and further) with an AR is seemingly tougher than the same distance with a bolt gun. Whether that's the actual rifle or the shooter is up for debate though.

 

[KMart]

I have gotten overzealous finding the "perfect" load for big guns shooting big animals. If you don't anticipate going past 100-150 yards, I'd stop right now and take your pick between the two and use your newfound extra ammo as practice ammo shooting from positions. My current 7 MM Mag took 1,100 rounds before I was happy - then I decided to use a different rifle......

Persistence Persistence Persistence. You just can't let one of those things beat you. That is one of the deep rabbit holes. BTDT