Share your 9mm 147 gr subsonic subgun recipe

[JiminAZ]

So I just sprung for a B&T APC9 Pro. (5.5" barrel)

Planning to load up a bunch of 147 subsonic ammo, likely with the RMR 147 FP bullet.

Anyone have a pet recipe? Planning to run suppressed so clean is good too.

Available powders:

AA#2, AA#5, Win 231, Bullseye, N320, N350, Unique.

Thanks.

[1168]

Unfortunately, I use other powders for 147gr subs (just because I have what I have), but with a 5.5” barrel, you should have no problems keeping 147gr under 1050fps with published loads.

[MegademiC]

Any middle of the road load will work. Im using 4gr unique.

[gaijin]

3.5 to 3.7 of n320/147 works well.
n320 is pretty clean too.

[markm]

3.4 gr HP38 which is the same as W231. 1.105" OAL. Keep an eye out for any of that "shelfed" brass. I had the 147 RMR push that shelf out due to it's length, and the rounds won't chamber.

[JiminAZ]

Markm, are you referring to a "shelf" in the ID of the brass?

[gaijin]

I've noted CBC and Magtech 9mm brass with the internal shelf.
Assumed it was to prevent bullet "set back" in subgun ammo. Unless you're using the bullet and COAL the case/shelf was designed for you have a problem, usually swelled case.

[markm]

Yes. What gaijin said. It's easy to keep an eye out to find them when you're loading. My 9 brass is a complete hodge podge of every headstamp under the sun.

[gaijin]

No kidding; I counted 23 different headstamps in a batch of "range brass". Would of never bet there are so many.

[223to45]

I've noted CBC and Magtech 9mm brass with the internal shelf.
Assumed it was to prevent bullet "set back" in subgun ammo. Unless you're using the bullet and COAL the case/shelf was designed for you have a problem, usually swelled case.

No it is so the can use less powder, take up volume inside the case, same pressure with less powder.

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