Originally Posted by
405grain
Gas Checks aren't really necessary on a 45 acp. The velocity and pressure are so low that for cast loads an ordinary plain based bullet will work best in that particular cartridge. As a side note: most concealed carry and personal defense instructors (at least the ones I've seen) highly recommend that you use factory made ammunition if you intend to carry for personal defense. The reason being is that in the unfortunate event that you have to protect yourself, the attorney representing the guy you shot (or his dependents if he's taking a dirt nap) will argue that you specifically manufactured your own ammunition with the intent of making it more lethal. So, actually, yes, this is a bad idea.
Use cast loads to practice and become proficient. Even though hand loaded cast bullets could be very effective, to protect yourself from litigation should you be involved in a self defense situation, it's probably best if you use factory ammo in your carry firearm.