YES, you can find different sizes, even in the same brand.. I did copied a design and used a comparator, they matched o.k.
remember with pressure, diameter can be lower than specified but never higher.
on certain 7.62 ammo I have found bullets measuring 0.3062 all the way to some 0.3082. I can only tell you to use what works in your rifle, if you are using brand X with good results, go with that same diameter. do not try to make something too exotic, remember we dont have any special rifles to try out the new bullets, and stupid... hurts...
here in mexico its very difficult for me to get nice barrels, and I for once dont want to mess with them. its also tough to get nice bullets, I know that when I run out of expensive bullets, I could still have a way out by "rolling my own".
I'm still tossing the idea of turned bullets around. For me it's starting to look like "Corbin". However I have yet to look into sabot, years ago they were as accurate as throwng rocks! Today might be different.
CORBIN SUCKS, He sent me the press about a year ago, paid in advance, and now he just wont make the dies I need, I'm in the die business myself, and need a single set of dies and then I will manufacture my own sets. he will not comply. we wont even answer my e-mails.
I dont want to buy used dies, to know real dimensions, in order to make my own. I wont sell them(that is not my bussines).
I'm thinking of buying, other brand of dies. (some are on the way).
imagine my factory, with two 1000 metric ton presses and everything in between. the equilibrium point is set at 56 million pieces, and I cant get some dies....talk about frustration!!!
or I could just buy another cnc lathe for my bullets...
lathe turned bullts will be more accurate. once I find an ideal guilding metal to make them.
REDHEAD, the cost of a single 300 smk in 338 in my part of the world is about two dollars a piece, so go figure.
maybe they are not better but, they work very good enough for me. and cost almost nothing compared to brand new bullets.
so far I have made bullets for 6.5, 308 and 338 without a problem. even made some dies for my quality control.
I dont plan on selling them, just using them.
its just like shooting and hunting with loaded ammo, it just gets your ego pumping. imagine doing that with your own bullets.....where is your pride?
best groups are 1/2 moa. but maybe its the shooter.
been using copper rods from my metal supplier, will get back to you with specs.
I' ve copied the contour of some excellent designs, but made out of copper, the bullets weight less and so far the have worked fine. even made some wadcutters to shoot 100 meters.. with excelent results..