| DUGABOY1 |
| (.400 member) |
| 11/11/09 06:37 AM |
|
Re: Beretta Gold Sable 9.3x74r d/r
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Quote:
I shoot better than I type the lower barrel shoot a two inch group and the upper about 1 3/8 groups still are not crossing at 80 yards and the upper and lower groups are about two inches apart in line with the point of arm.
rnb, that is a great pair of groups for a double rifle. One question: Is the top barrel shooting above the point of aim, and the bottom barrel shooting below the point of aim? If so,that is the way they are supposed to be, with the centers of each barrel's group on it's own side of the aiming point. If the composite group of both barrels is 3 3/8th inch from top shot to bottom shot withe the point of aim between them, it is shooting the way it is supposed to.
If the centers of each group are 3 3/8TH inch apart then the loads are just a little slow. If you add about 1/2 grain at a time, the two groups will come together but you still want the CENTER of each group on it's own side of the point of aim (not crossing)the top barrel on top, and the bottom barrel on the bottom with the bottom of the top barrel merging with the top of the bottom barrel's group.
You don't want the centers of each barrel's individual group to cross at any range, but shoot parallel. As the distance gets longer, certainly some of each barrels group will cross over into the other barrels group, but as long as the CENTERS of each group stays on it's own side of the composite group of both barrels the rifle is regulating properly!
Both side by side, and over under double rifle regulate the same way, with the only difference being the composite groups is laying on it's side for the side by side, and the Over under composite group standing upright both being egg shaped, with the aiming point being in the middle of the egg half way between the center of each barrels individual groups. O/U "8"
s/s "oo"