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anyone out there know why i'm shooting a ~0.75moa group at 100 yards and then the same bullets (remington corelokt 175 grain) are giving me ~6moa at 200 yards? are different rounds better for this gun?
 

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anyone out there know why i'm shooting a ~0.75moa group at 100 yards and then the same bullets (remington corelokt 175 grain) are giving me ~6moa at 200 yards? are different rounds better for this gun?
Almost sounds like a stabilization problem. But if you're printing 12" groups @ 200, I'd think it would be showing up at 100 to a degree.

Maybe try a box of 140's or 150's and see what happens.
 

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Factory, or reloads? Just wondering if you're not pushing them fast enough? That velocity should be way lower than what you are probably pushing them, but you never know? I would think the twist in the rifle (factory original?) would be fast enough for reliable stabilization.
 

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anyone out there know why i'm shooting a ~0.75moa group at 100 yards and then the same bullets (remington corelokt 175 grain) are giving me ~6moa at 200 yards? are different rounds better for this gun?
If you are using factory ammo & don't reload then you might switch to another brand or bullet weight. I've always found that reloading your own ammo usually results in better accuracy.
 

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175grain bullets for 7mm are rather long bullets. They may not be stabilizing in your gun. I have this problem with anything at or over 180 grain in my M700 SPS .308. The 1 in 12 inch twist isn't fast enough to stabilize that long of a bullet.

One thing I'm curious about is the remark,"giving me ~6moa at 200 yards?". 6 MOA at 200 yards would be greater than a 12" group. Is this correct or did you shoot a 6 inch group at 200 yards which would be around 3 MOA?

Another thing to consider is that 7mm magnum is known for fouling barrels and shooting out barrels. How are you cleaning the gun and how many rounds has the gun shot in it's lifetime?
 

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Another dumb, one-n-done question. Nobody asking that kind of question is handloading and I don't think there is a 7RM out there that won't stabilize 175gr bullets, with factory ammo. My guess is, he wouldn't know a minute of angle if you showed it to him in a science book and the only problem with this gun is the trigger interface unit.
 

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Another dumb, one-n-done question. Nobody asking that kind of question is handloading and I don't think there is a 7RM out there that won't stabilize 175gr bullets, with factory ammo. My guess is, he wouldn't know a minute of angle if you showed it to him in a science book and the only problem with this gun is the trigger interface unit.
He need to realize that MOA is = 1" groups @ 100 yards.
 

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Yeah, unless you're employing a scope that has MOA adjustments, discussing groups sizes in MOA isn't entirely appropriate; far better to say "I shot a 1 inch group at 100 yards" and avoid all the ambiguity. The problem isn't at 100 yards, or course, but when the ranges get longer...kinda like using yards and meters interchangeably.

In the case of the OP, it may be that his gun just doesn't do well with 175gr bullets, or that he isn't a good shot, or his version of "MOA" is less accurate than his shooting.
 

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In the case of the OP, it may be that his gun just doesn't do well with 175gr bullets, or that he isn't a good shot, or his version of "MOA" is less accurate than his shooting.
Was thinking the same. Might be the rate-of-twist of his rifle. I would think a rate of 1-in-9 would be the best for accurate shooting 175 grainers. Then again the 7 mm Magnum SHOULD be able to have enough velocity needed to stabolize the longer 175 grainers, using a 1-in-12" twist. Also the shooter could be the reason for not shooting good groupings.:confused:
 

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The standard twist in a Model 70, 7RM, is 1:9-1/4", which is plenty fast enough to stabilize a 175gr bullet, at the speeds factory ammo will produce. He'd have to load it much slower to create a problem, but since he didn't list the ammo he's using, factory or handload, let alone the velocity, we'll never know. :)
 

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Assuming its factory ammo its the same thing I'm shooting out of a M70 and typically 3" at 200 yards. 130 would shoot tighter but I use it for hunting and like the bigger thump the extra 45 grains get me. I doubt if its a bullet stabilizing problem but a sight problem. Again OP leaves us with zero details so who's to say, anything we come up with is pure guessing.
 

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Might want to consider that 3/4" group at 100 yards too. Did you shoot a 3/4" group once, or each and every time. Your wiggles might have simply overcome your wobbles. Out of my Winchester M70 in 7mm Rem Mag, shooting 160 gr Nosler Partitions, I ONCE shot a 3 shot group that spanned 3/8" at 100 yards. That doesn't mean my rifle is a "sub 1/2" shooter". When it comes right down to it a hunting rifle that will consistently shoot into 3" at 100 yards will still do the job of harvesting the animal. If under hunting conditions you can shoot under 4" at 100 yards then you're doing really fine. I personally don't think you've got a bad rifle. Ohh, yeah, you might have a rubbing spot in your barrel channel that will throw aim off but as a rule, most any hunting rifle that will print 1 or 2 inch groups at 100 paces is a prize to cherish. If I sound like I'm slighting you or criticizing you then I apologize. It's not my intent. But we all need to be a little more honest in our shooting abilities ... and the presentation thereof. If you've a 3x-9x scope on the rifle, and it's set at, say, 4, then a 200 yard target will be that much more difficult to aim on and hit as easily as the same target at 100 yards. I kinda think broom_jm has it right ... the problem is the interface.
 
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