Originally Posted by
RevolverRob
AIWB is more particular than a kid trying to pick "one toy" at the toy store. I have personally found that less tension and a less stiff belt is key, to me running AIWB. Also, search here for Southnarc's discussion on pants. If you wear "relaxed fit" pants, they probably aren't providing enough support. With AIWB you do not need pants a full waist size up. Pants are cut roomier in the front than sides and back.
A wedge and/or 'junk pillow' is usually necessary. Holster ride height matters a lot. A lot of guys find a longer holster for even a shorter gun, helps. Some guys don't.
Your height and weight matter less than the length of the rise in your pants and they way they sit on your hips. I am 5'7" and 210 pounds. And I can AIWB an STI without a problem. Though I find a smaller gun more comfortable.
You also may not ever find it comfortable.
For the holster, before changing holsters. Try different "tuck" methods. And see what works for you. Mastermind Tactics offers a wedge pack and ClusterFrack's 'junk pillow' which you can adjust the fill on. You can also hit up Dark Star Gear for wedges and a Dark Wing. As for a clip vs. snap loop you might try just one clip. With DCCs one is all you really need. I personally prefer the dcc monoblock, but I'm not sure it works for the Certum3.