Can you give me more information about IDPA and "not for competition" please? Why is the shadow a bad choice for IDPA? Weight?
The Shadow2 weighs to much and exceeds 43 oz limit and there is no way to get the weight down. It is a purpose built pistol for ISPC Production. The SP-01 Shadow and it's higher end iterations works well for IDPA.
Something to consider is the Glock 34 and M&P Pro rule IDPA SSP/ESP Divisions. The single pull light weight trigger and the light weight of the two guns plays into the sport better than the heavier DA/SA guns from my experience. This is not to say the SP-01 Shadow is a bad choice for IDPA. The guns are excellent shooters, reliable and accurate. For the most part it is the shooter that determines the score in any sport.
Frankly most shooters I see are served well with light polymer framed guns in IDPA. That said, they are equally served well by the DA/SA steel and alloy framed guns. I also have to say a large number of US based IDPA shooters shoot the same guns they carry. Given a choice most opt for and carry lighter guns over the heavier steel guns. This would account for the dominance of the two pistols mentioned. Both are relatively inexpensive and have less expensive siblings to start out on.
IDPA in 2015 introduced a "Not for Competition" concept which allowed guns that did not conform to any of the divisions to play as long as they were shot out of an IDPA approved holster. The 2017 RB does not identify the concept quite the same way bur does allow clubs to run "Specialty Divisions" see rule 8.2.10. There does not appear to be any holster constraints in the 2017 RB.
My advice to any shooter if you want to play the game then gear up so you can participate in any one of the six divisions set out in the RB. Personally, I would not buy the Shadow2, for example,
if I did not intend to play IPSC Production. The gun is heavy and IMHO 99.9% of the shooters who own one will not shoot any better than they would with a standard Shadow costing $600 odd dollars less. Just saying. I am sure there will be someone who went form D Class, bought his Shadow2 and instantly went to A Class or better but they would be few I suspect. Buying handguns is not a rational exercise. I speak with some personal experience. I just bought two excellent Beretta 92A1's to play IDPA with. I shoot my M&P PRO better but my scores are about the same based upon my Classifier scores but I can't become another Earnest Langdon with an M&P PRO. :>)
Take Care
Bob
PS Over 80% of the participants at the US Nationals consistently shoot either a Glock 17/34 or a S&W M&P FS/PRO if memory serves me correctly. Virtually all the other makes are represented. You see fewer DA/SA guns but more recently.
PPS With the US Army ordering the SIG 320 I would not be surprised to see more and more SIG 320's playing the sport over time.