"It was interesting to note that once I got zeroed and started trying a few loads the first shot would go to the point of aim. The second shot about 3-4 inches higher and the third shot that much higher again. The fourth and fifth shot would group nicely with the third shot. Let it cool down for a few minutes and the first shot would be right back on the point of aim."

Common with all Drillings and combination guns with full length soldered barrels. On the first shot the rifle barrel is warmed up and expands slightly lengthwise. As the shot tubes remain cold the whole barrel assembly bends slightly upwards. Drillings with free floating rifle barrels are an old idea, first offered by A. Frank about 1910, but these contraptions are just plain ugly.