I've purchased the three different sizes and had the ammo shipped down to Florida where I'm scheduled to teach a 2 day class in April. I'm hoping my co-instructor will swing by here on the way down and I can take one of my rifles with me. If not, I'll fly down and only take two pistols. That's probably the first chance I get to try this out, three different grain rounds in one magazine. I'll do it in both a full size 9mm as well as a medium sized one. Sig p226 & Sig P239