Tapered or parallel gas check shank?

[RickinTN]

Hello All,
Fairly new to casting, and learning a lot here. I have a question. I have noticed that some mold designs have a tapered gas check shank as opposed to the parallel shank which I think is most common. Is there an advantage to the tapered shank? I do from time to time have trouble getting a check on a bullet, and sometimes have trouble getting it "square". I can see that the tapered shank might help in this situation, but will the checks be as secure and stay on the bullet?
Your help is most appreciated,
Rick

[JeffinNZ]

The advantage of the taper is it allows the check to 'bite' into the lead alloy with sized onto the shank. Probably neither here nor there but most boolits in my collection are tapered on the shank.