The only Sig I've ever fired was a P229 in 9mm, but in the Glock 17 and 22 (and likewise the 19 and 23) I found the .40 to be a little more snappy than the 9mm. The recoil impulse itself was roughly equal, but it felt a little more aggressive in the .40 to me.
^^^ this....I tried to like .40 but it wasn't for me... shot a sig p226 and USP in .40 and it was a little too snappy for me.
Once I shot .45 ACP ... I stuck to 9mm or .45 in my handguns.
I actually liked the G21 but slide dimension made it a big gun, that's why I went with the 30s since its slide profile is exactly like a G19 and the grip is only slight larger than the G19. Also it handles pretty well, controllable and not snappy at all... haven't shot it with a flush fit 9rd mag since it comes with two 10rd mags but I hope to try that in the future and hopefully pearce makes a grip extension for it.
Shot my friends HK45 last week and that was fun gun to shoot... I might have to pick one up soon.
.45 ACPs ive shot or owned
- Glock G21 / 30s
- M&P 45
- Sig 227
- Springfield TRP no rail / half rail and full rail 1911
- Springfield Champion Operator 1911
- HK 45
.9mm ive shot or owned
- Glock 17/19/34
- M&P 9 and Shield
- Springfield XD/ XDM
- CZ Sp01 and P01
- Sig 226 /229 / P2022
- HK USP9
- RIA 1911 9mm