We might be getting bullet types confused. Remington produced Mushroom Cor-Lokt's in 100 grain only in 25 caliber. Used this bullet in both 250 Savage and 257 Roberts from my research. I do not believe, but do not know for sure, that Remington's 87 grain 25 caliber bullets were common cup and core bullets for varmints and not their Cor-Lokt bullets. I will have to go back through old ammo catalogs and do some reading.
