Guys, I'm a little vexed. My F. Zika Winchester High Wall in 32-40 has presented me with some issues I just can't figure out.

When shooting breach seated 200 grain bullets with 13.8 grains of IMR 4227, it shoots great, no issues with extraction, though I do get blowby on the cases. It has a tapered throat, and is quite obviously intended to be used like this.

However, since the only game around here is lever action silhouette, I have loaded fixed ammo with the 200 grain Saeco tapered bullet seated long, so that it presses the bullet into the ballseat / throat area of the rifle. Using the same 13.8 grains of IMR 4227 load. It does shoot quite well with this ammo. Oh, and I only size the necks of the cases with a RCBS die, and open them to about .002" grip on the bullet with a BACo expander plug. All cases are trimmed to same length.

The issue is I still get blowby on the cases, but 2 out of 3 cases don't want to extract. Very sticky extraction.

Generally sticky extraction is a sign of high pressures, and blowby is a sign of the case not obdurating enough to seal the breach completely, due to low pressure. Yet I am seeing both of these phenomena, sticky or difficult extraction and blowby. Again, no sticky extraction when breach seating.

I don't care so much about blowby, as that just seems to be par for the course. The sticky extraction has me concerned as I don't want to bugger up my extractor whacking the lever forward to break cases loose.

I had thought maybe the combustion residue in the chamber from blowby might be working as some sort of adhesive? I have also thought to full length resize the cases to see if that changes anything? I am also considering backing off the powder about .5 grains to see if that changes anything?

Any suggestions are appreciated.

Thanks in advance.

Thanks John Boy. I should add, no crimping on the bullets, and the case mouths remained flared a little bit.

Maybe it is a dirty chamber? Perhaps I'll take a chamber mop with me and wipe out the chamber between shots and see if that improves things?

Measure the outside of the case at the web.  See if the ones sticking are a bit larger then the ones that don't.  If so resize the web area only.  A larger diameter caliber sizing die with the same size web will work.  30-30?

Oh you'll have to do this by running the case into the die without the case holder and knock it out with a brass punch, or similar material.

Had two rifles with similar problems. One was sticking at the base. The other had a ring at the end of the chamber. 

Completely cover the cases that stick with a black Sharpie/felt marker. Fire in your clean dry chamber. Burrs in the chamber if any will show on the cases after extraction. Look down the side of the case in light, might be a small ring in the chamber. Measure the mouth of the case then compare to the neck a quarter inch back. 

Just remembered. Had another one that stuck on the extractor. Took me a while to figure that one out. Extractor was to long into the chamber.
         
              Joe.

I wish I'd have asked this very question of the guys around here. Would have saved a lot of gunpowder and lead. I have slowly figured most of the things mentioned by them, and bit by bit my fixed loads have become a source of some pride. Of course, I had fun wasting all that stuff,  to compensate.
If you need to size the base of a case, I think a .38-55 die would be best after the expander is removed. The other dies would raise hell with the size of your neck.

neck annealing can reduce blowback.
keep safe,
bruce.