I have had both. sold the g21, kept the g30. For me the g30 shot much more accurately and I was able to get on target much quicker with the g30. Had a few FTF's with the 21, but have never had any problem whatsoever with the g30. Have put close to 2000 rounds downrange and nary a problem. Carry the g30 every day and naturally, due to smaller size, conceals much better than g21. G21 is a good pistol, but I would recommend the g30. Go to a good shop and see if you can rent both and shoot. Just my .02.

I tried it two times. I tried the .223 in my M4 and they jammed like crazy. I also tried it in my 40SW pistol and they shot just fine. So I have had mixed results. Not a huge fan of steel casing but for the most part they work fine.. Along with the other post, they are not the cleanest either... For cheap ammo and if you gun will like it, it should work fine...

Similar to Wolf ammo, not going to destroy your gun - but not the cleanest stuff out there either.