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Originally Posted by dr. mabuse
I'm new to this type of rifle set-up and observed something strange today.
Put together a Bushmaster lower w/~3# trigger, A3 upper with 24" bull barrel, 1/8 twist, floated fore-end, Harris bipod and Leupold Mark IV on top.
I shot small 3 shot groups and reloaded after each group but each group was floating around within a ~ 3 1/2" diameter.
I folded up the bipod and shot off a ruck and then got consistent 1/2" or less groups without the groups wandering around.
Used the bipod and the problem returned.
I don't have to use the bipod but is there a way to cure this with a bipod attached?
Never saw this before with a bolt gun or a shorter AR.
Thanks
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If the bipod is mounted to the barrel there is your problem, if it is mounted to the forend then I don't really know, but what comes to mind is maybe a loose screw/bolt that needs to be tightened--not the same but I had that problem with one of my bolt guns...a possible solution for the barrel mount would be to shoot the bipod with padding attached to the feet, dampen the vibration as you say this only occurs off hard surfaces...you can't always put a duffle roll under your gun in the field and you'll have to rely on the bipod...just a thought