438470 testing

[Aviator]

Jim, I use the DZ Arms scope on my rifle, with scope blocks that allow use from 200 to 1000 yards.

On my Shiloh with 32 inch barrel, I use a 5/8 inch tall block on the rear, and a 1/2 inch tall block on the front. These blocks keep the end of the barrel from infringing on the center of the field of view. With this block height stagger, my 200 yard setting is about .100 inch on the DZ micrometer, and 1000 yard setting is about .350 inch. This is with a 540 gr bullet starting out about 1320 fps.

On my new Highwall with 34 inch barrel, I use 3/4 inch tall on the rear, and 5/8 inch tall on the rear.

For a dedicated Silhouette rifle, you don't need blocks that tall.

For silhouette, I don't believe having a front sight installed would be any issue.
However, for long range you might be better off removing the front sight.

With the scope installed and set for the highest elevation you need (and action open!), put your eye out several feet in front of the barrel, and look back through the center of the scope . If you can see the cross hairs above the end of the barrel (or bottom of the front sight), you should be good to go. If the end of the barrel prevents seeing the cross hair when looking back through the center of the scope, you need taller blocks.