.25 pellet resizing

[gstrain]

I recently purchased a Shooter's Box .25 pellet resizer and ran about 100 JSB Exact King pellets through it. I did feel some resistance when I pushed the pellets through which did not happen if I did it a second time. Any bent skirts also seem to be rounded out again and looked great.

Unfortunately, when I tried shooting them they were not controlled at all. several missing entirely a 10x15" target area. This is really puzzling me.

Is it possible that the resizer reduced the skirt size causing the barrel to not control the spin and the pellets just go off at widely varying trajectories?

 

[bigHUN]

I have the TRrob adjustable pellet resizer and the hole is conical. That makes two diameters one on pellet head and larger on the skirt. Adjusting the "depth" adjusts the resized ring on the head which needs to engage with the land in the rifling.
I am surprised that you didn't inspect the "head seize" of the resized pellet with pushing it inside rifling (slug it) half way (and retract it back).
The skirt is a secondary importance only, it will expand to rifling shape from the air blast anyway.

 

[sonnysan]

What is the sizer dimension? .249, .251, etc?
Did you slug the barrel? If not, you will need to do that.

 

[bigHUN]

First step, push the pellet into barrel rifling half way and from other muzzle end push it back out;
Second step, push that same pellet through your pellet sizer;
Third step, use a jewellery lupe and inspect the pellet paying attention to the head.
Any rifling marks remaining on the ring made by the sizer?

Edit: adding pictures

this is a resized pellet, my is a 1.5 degree conical hole, you see the ring on the head and ring on the skirt

Pushed the resized pellet into the rifling (slugged it) 2-3 inches deep and retract it, and these are the rifling marks

 

[gstrain]

Thanks so far for all the instructions and information. I had no idea what slugging it meant. Now I have several things to check to see if I can understand what the mechanics of the resizer are. It is sold as a .25 6.35 sizer so I need to get a micrometer to start checking some of the pellets. then put some partway in the barrel and see if they show rifling marks. I always seem to believe that the skirt was going to be a little tight in the barrel to make a good seal, now it seems the skirt is flexible enough that the air pressure forces it to seal. I hope I understand all so far. I will try to put into practice tomorrow. I have some more pellets coming that I can get better measurments on before and after resizing.