Let me think about that and get back to you. I don't like to do special requests because if I charged a fair shop rate, say $50 an hour, it would be cheaper for you to buy a new mold. However, I am not that busy right now and might humor your request providing you agree to post a detailed range report on the bullet before and after.
There is no doubt that adding bearing length generally increases accuracy, however, there is more than one way to add bearing length.
The secant is normally used for lever guns with tight throats (does not apply to most 357's) or wheelguns with tight throats like the FAs.