9 mm in IHMSA Field Pistol?

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Unlikely

The 7mm IHMSA cartridge from a 15” bbl produces 2,200-2300fps with a 154gr cartridge.
The 9mm with a 147gr produces 1,100-1,200fps at the muzzle. At the distance to the silhouettes, it’s perhaps 700-800.

Apples to oranges comparison.

I may stand corrected. Field pistol uses 1/2 scale targets. At 100yds for rams.

I’ll still recommend it (147gr). As it starts subsonic and doesn’t experience the transonic turbulence that causes the accuracy issues.
In PPC competition I used a 115gr JHP as they remain supersonic beyond 50yds, but transonic beyond. I never shot a 1490 with a semi auto, but did with .38 revolver.
LongShot is what I use with a 120gr cast @1,200fps. With a 147 I recommend AA#7.
My S&W performance Ctr. PPC 9’s have 1/18 3/8” rifling as do the revolvers, so is best with lighter bullets. They were also factory tuned with 115’s.
However, many of my fellow competitors used 147’s.
For practice I’d suggest the RMR FMJ’s. For matches, the Hornady 147gr XTP.
 
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I'm a little late to this party. My standard IHMSA field pistol load is a standard pressure 125 gr TC cast over 4.5gr HP-38 in .38 special. I shoot this through both a 10" TC and a 6" revolver. I have never rung a ram. It knocks them down with authority on a solid hit, and tips them on a fringe. This load is very comparable to 9mm-124gr, with the edge probably going to 9mm if shooting rn FMJ due to a slightly better BC. The field pistol target is not difficult to knock over. Reduced .22 Hornet and .25-20 cast are popular options for the TC crowd. In my back yard, with a high-solid hit, I can knock them down with standard vel 40 gr .22LR.
 
Seen a guy run a Beretta and he did very well on chickens and pigs. Fixed sights made it a tough gig on the eagles and sheep LOL.

BTW my field pistol rig for IHMSA was a 648 6" w 40gr Winchesters. It would rarely leave a ram standing w a hit.

Dunno how the targets were set.
 
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