It quite possibly could affect accuracy by reducing neck tension.

Bob says: " I just pull the bullets, put the propellant in a pan, then neck size without the decapper. Leave the ball on there. If you have a bushing die you don't even have to dump the powder."

At this time it was not clear if Delta used factory or reloaded ammo.
I removed bullets from factory ammo several times (with the hammer type bullet puller where the powder comes out anyway) and weighed the charge. It's amazing how much spread the load had.

So, my advice is to always check and adjust the powder charge with commercial ammonition if you decide to pull bullets.

By the way - not only the powder had an unacceptable weight variance. The bullets had it as well.

Delta Hunter

Yes it will effect accuracy as will using some pulled bullets.How much is the question.

Yes