Will 147 grain and 135 grain staye subsonic in the 10.5" barrel?

PSA Products AK-V
1

I have swapped many parts in my PX9 and settled on an 8" barrel to keep 135 grain Critical Duty subsonic, and I like my hand placement on a 7 inch handguard, but if i purchase an AKV i want to SBR and suppress it.

I want to use subsonic ammo and keep it subsonic. In my experience, a 10" barrel was still subsonic with 147 grain but there are more factors than barrel length.

In your experiences, will that be the case for the AKV with a 10.5" barrel?

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Cant speak specifically to the akv platform, but speer 147gr out of an 8" mpx stays sub. Youll probably be fine given how fast pistol powders burn, but might be prudent to text a box before buying a case.

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Honestly it depends on the ammo, your altitude, temp, etc. I have seen 147 gr out of a 10" ar9 barrel shoot close to 1100fps, which is borderline supersonic. A different ammo, also 147 gr, was just over 1000fps.

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