I have previously reported how well my Chapuis shot at 200 yards. I fired it the other day at 300 with the following results. These shots were fired prone off of my pack with a Swarovski 1.5-6x42 with the circle dot reticle. This scope has 1/3 minute clicks. I came up 18 clicks from my 100 yard zero, and 4 clicks right which put the 286 gr Nosler Partitions from the right bbl impacting at the point of aim.
The shots from the left barrel hit @3 inches left and @ 3 inches lower. The composite group, right and left bbls, was 5 1/2 to 6 inches.
The 286 Woodleigh's with the same sight setting hit @ 14 inches lower than the Noslers. The left bbl hits 7 inches to the left of the right and 4 inches lower.
This is the trend with this rifle, with the right bbl hitting point of aim the left bbl hits to the left and a little lower than the right.

Much has been spoken on this forum about shooting doubles R/L or L/R. Maybe because the bbls on the Chapuis are so thin I MUST shoot this rifle R/L. When I shot the left bbl first at 100 yards I did not hit a 8x11" sheet of paper. I fired a second shot and still did not hit the paper. Then I immediately fired a R/L pair. both of those shots hit center. Even when I get the bbls very hot as long as I shoot R/L, R/L, R/L the rifle shoots good groups.
I will test L/R at 50 yards when I get the chance. It may be that the thicker bbls of big bore doubles at close range are not effected by this phenomonon, I have not noticed in in my 450 No2 or my 450/400 at close range, I will have to see about the 9,3.

Thanks for this... I doubt any of us have taken serious time on long rangedouble shooting.. it's a great thing to know it CAN be down well.. and less than 2 moa from 2 barrels...

jeffe