I have been loading handgun ammo and have a bunch of cast I thought of building for plinking rather than my jacketed slugs.Now the problem,I have some cast that weight 158 grains,I have another bunch of castI was considering and they weighted 132-135!Not much info on such thing,so what do I do for reloading specs or do I load them moderate with 125 bullet specs?I have enough honest 158's to stay busy but the oddball bullets looked too good to waste.

I would got with a max. load for the 125 grain and work up.
Have done this several times in the past

what cal. are they for? If it's a 9mm be carefull ! this is a high preasure load to begin with.

Ok a max charge for a lighter bullet and work up NOOOOOOOOOOOO!!!!!!!!!!
A max charge for the 158 maybe .I'd startat about 75% of a 158 load and see what you get .
The bullets maybe too hard or some wierd alloy (zinc)or a guy with one mold trying to get a 9mm wieght bullt out of a 357 mold ( I thought about trying it erred to safty I'll buy the lighter mold) .
I shot some 85 grain gold dots in my 357 may have been doing 2000 fps shot fine , were 355 dia for 380 acp .

I may have to print this to look back on! I have enough Hornady cast to last a long time but I will set these aside till summer to tinker with.The are .357 and not 355 so I'm good there,may just load them as 38's when I get around to it.Thanks guys