30-06 Subsonic

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mchughcb
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30-06 Subsonic

Post by mchughcb » Sat Oct 07, 2017 11:36 pm

(Cartridge) 30-06

(Brand of bullet) Woodleigh RNSP

(Weight of bullet) 220

(Brand of brass) RWS

(Type of powder) Trailboss

(Grains of powder) 15gr

(Brand, and type of primer) CCI LR primer

(COAL)

(CBTO)

(FPS/MPS) 1096

(Rifle) R93

(Barrel Length) 24"

(Scope) Swarovski PH 3-12x50 SR

(Weather conditions & temp)

(Accuracy @ 100 yards/meters) 33mm@100m

(Notes) Needs to be about 80mm high at 50m for a 100m zero.

*********************************************************************************

(Cartridge) 30-06

(Brand of bullet) Woodleigh RNSP

(Weight of bullet) 220

(Brand of brass) RWS

(Type of powder) Trailboss

(Grains of powder) 14gr

(Brand, and type of primer) CCI LR primer

(COAL)

(CBTO)

(FPS/MPS) 993
(Rifle) R93

(Barrel Length) 24"

(Scope) Swarovski PH 3-12x50 SR

(Weather conditions & temp)

(Accuracy @ 100 yards/meters) 33mm@100m

(Notes) Needs to be about 85mm high at 50m for a 100m zero.
Last edited by mchughcb on Sun Oct 08, 2017 5:03 am, edited 1 time in total.



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stokesrj
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Re: 30-06 Subsonic

Post by stokesrj » Sun Oct 08, 2017 4:57 am

If keeping below the sound barrier is important to you, I would back off a little. This load will be supersonic under different atmospheric conditions unless you took that velocity reading at a very high altitude, low pressure. Also I've noticed that in most of my trailboss loads I get unexplained variance in velocities that would most likely also put you over. However if it is accurate and you aren't concerned with breaking the sound barrier under some conditions then no need to do anything. I suspect that the long profile of the 220 grain Woodleigh will make the transition to transonic without destabilizing but you might want to check that also.
This is why most 22LR long range target ammunition >50 yards is held in the neighborhood of 1050, to avoid a transonic destabilization. While short range <50 yard target ammunition may be closer to 1100 fps.
Robert J Stokes

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mchughcb
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Re: 30-06 Subsonic

Post by mchughcb » Sun Oct 08, 2017 5:04 am

Updated with a grain lower. So 14.5gr looks about right for 1050fps.

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