Thread: Subsonic 308

Originally Posted by CreepingDeath

I thought the idea was to use big long projectiles ie 220s that cause damage by tumbling through the animal

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If you can't get expansion and or fragmentation then that would be the next best thing.
How do you guarantee it tumbling tho and not just upsetting a bit and pissing off in a different direction in the animal.

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Originally Posted by veitnamcam

How do you guarantee it tumbling tho

Probably dumb answer but what if you took out all the rifling? I know you wouldn't do that to your .308 but a old .303 or something with a fucked barrel.

Originally Posted by veitnamcam

If you can't get expansion and or fragmentation then that would be the next best thing.
How do you guarantee it tumbling tho and not just upsetting a bit and pissing off in a different direction in the animal.

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Don't you just use the minimum about of powder to get the projectile out of the barrel and let the wind tumble it

On a serious note Cam, what would a projectile suited for the 30-30 go like as a sub? Maybe even Hornadys 'FPX' projectile.

Originally Posted by veitnamcam

If you can't get expansion and or fragmentation then that would be the next best thing.
How do you guarantee it tumbling tho and not just upsetting a bit and pissing off in a different direction in the animal.

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Wee bit out of my league here but, when the 5.56x45 was designed and tested before the "Nam" they were relying on the tumbling effect to cause massive wounding, now im pretty certain that the projectile was a 55gr pill called M193, Changed when the 556x45 became a Nato round in 77 because It was apparently inhumane due to the massive wounds it caused in comparasion to its small size. It tumbled and yawed I believe because of its centre of gravity was close to the base of the pill. Its tendancy to yaw and tumble "could" well be recreated by using a 7.62 pill with a similar profile/scale to the M193. Unsure what the lower velocity will do but a naturally unstable projectile is just that so maybe worth a go. 110gr barnes hehehe

Originally Posted by hanse

Wee bit out of my league here but, when the 5.56x45 was designed and tested before the "Nam" they were relying on the tumbling effect to cause massive wounding, now im pretty certain that the projectile was a 55gr pill called M193, Changed when the 556x45 became a Nato round in 77 because It was apparently inhumane due to the massive wounds it caused in comparasion to its small size. It tumbled and yawed I believe because of its centre of gravity was close to the base of the pill. Its tendancy to yaw and tumble "could" well be recreated by using a 7.62 pill with a similar profile/scale to the M193. Unsure what the lower velocity will do but a naturally unstable projectile is just that so maybe worth a go. 110gr barnes hehehe

The cannelure on the M193 causes it to break apart when it tips over, if speed is sufficient. The change over I believe was due to concerns about defeating body armor - M855 has a steel penetrator.

Back on topic, what about a 110gr V max? Yay/nay?

Years ago i shot a red in the shoulder with military fmj that i hadn't cut enough off the tip out of my old 303 with almost no rifleing left and it ended up in the hind quarter, basicly turned 90 degrees to flight path inside the animal!

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AHH scratch that last comment, just re-read the first post "Pistol" projectile. You are a bit more advanced than my thinking, with projectiles suited to sub sonic speed.

Looks like they were effective anyway, I wonder how far away they would be effective to.

Thats what i got from a greg duley arcitle on the subject. Also not long ago there was a write up called 338 ninja and he had special subsonic projectiles that were designed to fragment at low velocity and had like a 20 grain .17 sabot in the middle of it that went straight through

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So any good recipes for subsonic loads for deer in 308? Cheers

Can't say I have tried any others.
Still waiting on spanners :rolleyes:

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Send me your ph number Cam and we'll sort final billet size.
Maybe then I can send you some to test

Sent

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Light weight 30cal pills are pretty much as long as they are round so even if it tumbles you might as well be shooting a round ball .

I can see the logic in tumbling but its to random and impact velocity is to low to produce significant wounding in a subsonic round.
You need a fragile copper jacket around a soft lead core that will expand and fragment with sharp copper edges in heaviest weight you can stabilize .
Imho.

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Originally Posted by veitnamcam

You need a fragile copper jacket around a soft lead core that will expand and fragment with sharp copper edges in heaviest weight you can stabilize .
Imho.

You're onto it
Want bonding?, hollow point?, plastic tip, lead tip, steel tip?

Originally Posted by Spanners

You're onto it
Want bonding?, hollow point?, plastic tip, lead tip, steel tip?

All irrelevant if it will expand violently fragment and retain around half its weight.

Whatever tip it needs to do that?

Bc is irrelevant also out to 80y

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