I must say bitstream, I agree.
One .40 S&W round would do a better job stopping a BG than one 9mm.
You figure in my 9VE's 16 other 9mm rounds, I'm not the least bit concerned!
Out & about I wouldn't have but two spare mags with me, but at home I would have 4 more mags to back up the first for a total of 80 rds!!
If I can't stop'em with the first 79, I might keep the 80th one for me!!
Tslepebull I hope the Sigma is just there for piece of mind & you have no need to dust if off!!
Have a safe trip!!