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Discussion Starter #1
Wondering if you can tell a difference in recoil with using subsonic 147 grain vs 115 grain or really any of the others like 124 and 135?
So far my favorite Ammo to shoot based on felt recoil is Freedom Munitions 115 FMJ new. It has more of a muted thump and just seems overall “smoother” than say a 124 grain Federal Syntech which I would describe as more of a snappy round with more kick to it. I’m guessing that from what little research I’ve done the loads with less actual muzzle energy in foot pounds is what determines what feels best to me. I haven’t used any 147 and just realized that most of those are subsonic so I am curious about how they feel. I have a Perf Center Pro 9 M2.0 5”.

Any comments?

SB
 

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You are not comparing apples to apples, but different brands and different velocities. That's OK, as long as you realize it. I have found that when shooting the same brand of 115 vs 124 gr. bullet, the 124 grain "seems" to have less recoil. Since recoil is subjective, that probably doesn't mean much. I've never shot 147 gr. so no help for you there.

According to a chart I found on line, the speed of sound depends on height from sea level and ambient temperature, but is "around" 1135 ft. per second, more or less. Realize that the rated ammo speed is likely from a full size gun barrel, or in some cases from a rifle barrel, so that is all "If" and "maybe" -- however, any round with a speed of less than "around" 1135 ft per second could be classed as subsonic.

How's that for muddying the waters?
 
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I’ve never shot any 147gr 9mm myself, but I know several friends that use it for IDPA and carry because they say the recoil is “less” for faster followup shots.

I don’t consider the recoil of any 9mm ammo worthy of note.
 

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i would be more interested in which loads give better groups in my 5" Pro.. another reason to think about reloading your own 9mm. though even finding bullets, primers, powder and brass to reload with is very hard to find right now..
 

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Another thing to consider, since you don't have an elevation adjustable rear sight, is that a heavier and slower load in any given caliber will impact higher on the target.
My 5 inch MP9 hits dead on at 25 yards with 115 grain. 124 grain loads hit at the top of the bull, only 1 1/2" or so high, not enough to be a big deal.
When I tried some 147 grain that I had used in my Shield, it impacts 4 to 5 inches high, a bit too much for my tastes.

As Rick M said, I don't find any 9mm load has excessive recoil, so I wouldn't choose my load according to slight perceived differences in recoil.
To me, a 124 grain has a decent weight and mass, yet still has some good velocity to it.
 

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Discussion Starter #6
Thanks for the reply. Have shot both 124 FMJ and JHP and 124 is what I have for home defense. A friend of mine who is also new to firearms said he tried some 147 and it kicked the worst of all he has tried. I agree that 9mm overall is not at all too bad for recoil but what I was hoping for 147 since it can be subsonic evidently isn’t really noticeable....
SB
 

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I shoot 147 and 115 in my 4 inch 2.0. Never thought much on it. But, haven’t noticed any recoil difference. The 147 are hollow point.
 
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