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#6086137 - 12/15/15 06:50 PM Shooting Subsonic Ammo
huntpp23 Offline
Light Foot

Registered: 04/21/14
Posts: 18
Got a question for my forum friends. I recently purchased a Daniel Defense 300AAC Blackout SBR with a Silencerco Omega 7.62 suppressor.

Shooting with a Leupold VX-R 1.25-4x scope. It is dialed in at 100 yards. Perfect bullseye everytime when shooting supersonic hunting rounds (115grain or 120 grain. When I shoot subsonic (220grain) ammo at 100 yards, it is shooting about 10" low and about 4" right every time.

Anyone know what might be going on? I'd like to be able to shoot subsonic accurately at the range, but since it is sighted in perfect for my hunting rounds, I really do not want to mess with the scope. Any suggestions?

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#6086204 - 12/15/15 07:26 PM Re: Shooting Subsonic Ammo [Re: huntpp23]
cattle69 Offline
Pro Tracker

Registered: 02/15/06
Posts: 1627
Loc: san angelo
I can't believe it's not shooting lowere than that. I use a scope that I can dial in the two different loads.
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President and cofounder of magical pellet club.

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#6086229 - 12/15/15 07:36 PM Re: Shooting Subsonic Ammo [Re: huntpp23]
dogdown23 Offline
Tracker

Registered: 02/15/14
Posts: 940
Loc: TX
I'd be happy if I were u. 10" low with subsonic isn't bad. You'll just have to figure out where to hold to hit zero.
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Dogdown

The only thing that'll stop a bad man with a gun, is a good man with a gun.

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#6086468 - 12/15/15 09:25 PM Re: Shooting Subsonic Ammo [Re: huntpp23]
sneakyfletch Offline
Woodsman

Registered: 07/08/13
Posts: 184
Loc: burleson
If it were me i would zero my turrets with supersonic ammo and then take a white piece of tape or nail polish and line it up with 10moa and 4moa on your windage.think of it as 2 selector swithes your turning them to supersonic or subsonic.that way you will have two 100 yard zeroes.if your zero changes take tape off or remove nail polish and repeat.
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99% is showing up

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#6087277 - 12/16/15 09:59 AM Re: Shooting Subsonic Ammo [Re: sneakyfletch]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 11040
Loc: Lewisville, TX
Yes, the subsonic ammo is going about 1/3 the speed of the supersonic round. Therefore it drops a lot more. The point of impact shift is a repeatable shift, so learn how to correct for it, and you will be on target. I would also learn the trajectory of the subsonic rounds.

I also make/sell an SBR load that runs 1040 fps in the 11" barrels. When you run normal subsonic ammo designed for a 16" barrel, the SBR's lose about 100-150 fps on an already slow round. This SBR load gets your speeds up for more energy on target.

http://dallasreloads.com/product/sbr-208-grain-a-max/


Originally Posted By: sneakyfletch
If it were me i would zero my turrets with supersonic ammo and then take a white piece of tape or nail polish and line it up with 10moa and 4moa on your windage.think of it as 2 selector swithes your turning them to supersonic or subsonic.that way you will have two 100 yard zeroes.if your zero changes take tape off or remove nail polish and repeat.


^^ Good idea
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www.DallasReloads.com
Type 01 and Type 06 FFL

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