oversized cast hard lead bullits

[mister c]

what problems with using oversized cast lead boolits, say .001 or .002?

[blikseme300]

Don't see any problems, just advantages. What cartridge are you referring to and what do you define as hard?

[WALLNUTT]

Over what size? You want fit.

[runfiverun]

No problems.
You may see @500 psi increase at the .002 larger boolit but you don't see
a major pressure increase untill .004

[mister c]

.44 mag SSK 18 + brinnel

[jonp]

No problems.
You may see @500 psi increase at the .002 larger boolit but you don't see
a major pressure increase untill .004
Do you have any testing or something to read on this that proves the pressure curve increase at that oversize point?

[WALLNUTT]

Still didn't say over what size,but loaded may not fit in chamber.

[DougGuy]

IF..... Your cylinder throats are uneven, have them corrected first, then size half thousandth under their diameter. This is the short explanation of how to best figure out what size boolit to use. As said earlier and many times on this forum, fitment is KING. It won't do any good to work with a cylinder with large and small throats, and many of them have this. You really do not want to go over throat diameter, this causes nothing but problems. Over bore diameter by .001" or .002" is fine, and for the most part, suggested, not totally necessary but generally accepted by the majority of cast boolit shooters, but have the throats reamed to accommodate your chosen boolit diameter.

[44man]

Not a thing at all. DougGuy brought up throats, very important so do not shoot boolits larger then throats, not dangerous but you ruin your boolit. .001" to .002" over groove is what you want.

[BAGTIC]

Any slight increase in pressure should be accommodated by standard practice of starting loads low and working upwards.

[dtknowles]

Any slight increase in pressure should be accommodated by standard practice of starting loads low and working upwards.

While I would not worry about the slight pressure rise. I also agree that the proper practice is to start low and work up. While working up, how do you decide if a load is generating too much pressure?

Tim

[44man]

It is a given to start low, however I always wind up with the same loads. I never shoot max anyway.
Cast is more forgiving then those other things.