Awf Hand,
Have you ever tried to shoot this gun by breechseating the bullet, followed by a cartridge? With the long throat, you might get better accuracy by simply dropping the bullet into the chamber, and seating the cartridge behind it.
I have one single shot that I can seat the bullet into the neck of the case just slightly touching the first lube ring, (about 1/8") and it shoots very good groups that way.
I make up my loaded cases beforehand, and put a small cardboard wad over the powder to hold it in place. Then I simply push the bullet into the case to the lube ring, and chamber it. With a hand re-de capper, I can reload easily and keep shooting. You might give this a try, next time you're at the range.