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Rifle Scopes Tunneling effect bad or good

GillJr

Sergeant
Full Member
Minuteman
Dec 11, 2009
244
1
38
NC
My little brother has a short ar-10 with a leopold hamr on it. It's a great concept with a red dot on top and a 4x tube on the bottom. So we went out shooting, I can shoot my ar15 and remy 308 with bullets touching. But behind his ar10 I am lost. The tube has no tunneling effect at all compared to my USO. No tunneling effect is not letting me square up the scope to get precise shoots. Any suggestions.

I shooting terrible groups with it. Hell I wouldn't even call then groups.
 
Re: Tunneling effect bad or good

Just asking what your opinion? Is some tunneling good. I personally prefer it.