Thread: Subsonic 308

Roger, was just thinking thin jacket might = some degree of expansion at low velocity

Okay, getting serious now...the V1.1 sub-smasher is loaded ready to go. I'll load up ten or so and I'll take a day off work next week to find some goats to trial it on. Poor goats, they seam to be my default testing medium these days for all my projects.



If the general concept works out, then I'll make up a jig to get a more ''professional'' finish.

kj

looks like it could work. I have the powder now, all im waiting on is a decent projectile to start loading some of these for the 308. Following with interest

And slightly more serious (yes I have OCD), just to make sure that my results are based on a few kills (hopefully?)



kj

Let us know how they go

Sent from my GT-S5360T using Tapatalk 2

Originally Posted by veitnamcam

Let us know how they go

Sent from my GT-S5360T using Tapatalk 2

Results here http://www.nzhuntingandshooting.co.n...94/#post117907

kj

What thickness is the 240 SMK jacket in the nose section?

Originally Posted by Spanners

What thickness is the 240 SMK jacket in the nose section?

Ahh, you're onto it spanners, I just filed the tip off one to see and its real thick! Maybe 1mm and hard as fuck! The hollow point is only in the jacket material too, so nothing in the lead.

So this inspired V1.2

Braking news: Version 1.2 is now out!!!!

I filed the tip off, turns out the jacket material is very thick. Then I drilled a very long hole, and did my ''flutes'' as well, followed by using a primer flash-hole deburring tool to put a nice bevel on the inside of the hollow point.


Puling the bullet


Drilling the massive hollow point hole (20mm deep)


Cutting the flutes


Deburring tool used to open up the front of hollow point


V1.2 V1.1 and standard 240grSMK for comparison.


Now I just need some more time to fully test it again - fingers crossed?

kj

The jackets ill be using are Hornady AMP jackets.
Measure 0.4mm thick in the nose section

The pushed base 1st through this die


The core is seated with this punch to weaken the core nose


Then hollow point cavity is made


Plastic or steel ball set into the hole then nose formed in 1.5 radius


On a note of progression, Vietnamcam made me some nice lead billet moulds which arrived today.
If the rain does down ill try and pour one and make some wire for the cores

A wee bit more professional looking than my backyard attempt. But hey, I'm still working out the bugs in the prototype.

I'll be very keen to see what results you get.

kj

Ill send you some up to have a play with when done
Will just be flat base as wont have chance to sort the rebates boat tails immediately

Originally Posted by Spanners

Ill send you some up to have a play with when done
Will just be flat base as wont have chance to sort the rebates boat tails immediately

That sounds awesome, thank you.

kj

Id be keen on a few.

Originally Posted by veitnamcam

Id be keen on a few.

You'll get a few lol

Found an off cut of wire so had a play
1st 4 30 cal
All with serrated jackets and split cores
They are rough as I wanted to see what weights can be made
From left to right 230gr 1E, 245gr 1E , 245gr 1E hollow point, 245gr HP 6S nose


The big HP measures 8mm deep and 3mm wide

208 for size comparison


300 blackout/whisper case


All on all pretty happy for what was nothing more that proving time for the sizing of dies.
Could prob go heavier on the lead tip HP and will go 220-230 on the ball tipped ones.