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Forum Index > Rifles general discussion > Swaging projectiles .375 to .366 (9.3mm)

Swaging projectiles .375 to .366 (9.3mm)

04 Mar 2015
@ 09:55 pm (GMT)

Martin Taylor

I have been meaning to post about reducing some Hornady Interlock 225g .375 cal projectiles down to 9.3mm for a few weeks but have been bloody busy, including an amazing trip to NZ to shoot LR with Nathan.

After discussing the 9.3mmX62 with Nathan as a Factory built, 35 Whelen substitute l picked up a SS Tikka T3 (Tikka bedding post) that suited my build requirements. Then went off looking for projectiles. As l ’m not hunting the large dangerous game with the heavy construction/weight projectiles this calibre was originally intended to be used with we needed some options.
I could not justify using the extremely overpriced, light weight for calibre Euro projectiles so we discussed using the 225g Interlocks with the Idea of swaging/drawing them down to .366. I have been using the locally made Woodleigh 250g RN and these worked extremely well but the Idea of using/testing the Hornadys was always there, just waiting for stocks to return here to Aust.

l found many references to people using 222 dies and machining them off in the taper of the body until the projectile when pressed through is reduced down to .366.
I ended up taking the temper out of the dies and machined them on a lathe so that one die reduces down to .368 and the second sizing down to .3655 (as measured with my Mitsitoyos & same as the Woodleigh's) and then re-tempered them. The final sizing die has a 10mm sizing section so there is no spring back in the projectile that l had heard mentioned many times. The shallow taper in the dies aligns the projectiles perfectly.
I didn’t end up using these in my press as l felt it’s too much strain on the linkages. I made a pin that fits into the dies neatly and knock the lubricated projectile (sizing wax) through with a hammer. The dies have 2 lock nuts tightened on them and sit in a deep impact socket on my vice anvil.

I have an moa load with 2208 and will be using them on Sambar deer in a few weeks l hope!!!! so it should be interesting.

Nathan mentioned he has been asked about sizing other calibres and with some careful die selection or a specially made tool, l don’t see any reason why this wouldn’t work just as well.

I forget the photos to put up on photo bucket so this all makes sense, l will get that done tonight.

Cheers Marty

Replies

1
05 Mar 2015
@ 05:33 am (GMT)

Bob Mavin

Re: Swaging projectiles .375 to .366 (9.3mm)
Hi Marty
Very interesting mate. I would have thought it would tear the jacket
We use 270gn Speers in a 9.3x62 available from the link below

http://www.theopenrange.com.au/projectiles.html?caliber=1307

I use 225gn Sierra Game Kings in my 358 win with good results but prefer 225gn Woodleigh P/P

Keep us posted please
Bob
05 Mar 2015
@ 09:11 pm (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
The jackets still look perfect Bob & still shoot very well.
I also love the Woodleighs as well, just trying something different & hopefully do some testing for Nathan at the same time!
Hopeing to get a slightly reduced recoil load for juniour to use with this lighter pill as bonus.


Heading up the hills today to do some final load testing and who knows with a bit of luck a Sambar might just step out in front of us!

Cheers marty
05 Mar 2015
@ 09:15 pm (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
05 Mar 2015
@ 09:19 pm (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
[email protected]*k it l give up!
05 Mar 2015
@ 10:41 pm (GMT)

Nathan Foster

Re: Swaging projectiles .375 to .366 (9.3mm)
Hahaha- sorry, that cracked me up Marty.

Try the following next time:

1. Make sure your photo is sized to web large. I use MS office but you can edit in photo bucket. 640x480 is what we are after.

2. With the image ready to go (make sure you are not viewing the thumbnail verswion), proceed as per the pic below:



3. Hit the Ctrl key and V key at the same time to paste.

Job done.





10 Mar 2015
@ 03:10 am (GMT)

Mal Birrell

Re: Swaging projectiles .375 to .366 (9.3mm)
Mate i wouldn`t use the 225gn .375 pills on a Sambar. I`ve shot a few pigs with them and if they hit bone on a rear end shot(usually do) they don`t penetrate deep enough into the pig to kill it,they then need a finisher.Of course they are in 2wd by that time....
Side on shots they make a very big exit wound with a very dead pig.
I`d use 250gn or more for Sambar,just in case.
Mal.
10 Mar 2015
@ 04:11 am (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
Interesting results Mal, I will run my Woodleigh RN 250's under the 225's for the first couple of animals as insurance.

I only use Texas heart shots for wounded animals and by by that stage l only want to slow it down to finish it of anyway. And luckily thats only happend once over the years.

Marty
10 Mar 2015
@ 04:35 am (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
Should add, that this is being done as a projectile test Mal.

My Woodleighs work very well as l have already said and will continue to work with these great projectiles.
I looking for a cheaper, softer pill that will work in close with lower velocities & recoil for plinking etc. I havent found that option for this cal still being expensive to feed.
This is how this Idea came about and we then decided to test them on larger game at higher velocities as well. I run the 150 Interlocks in my sons 308 for the same reasons and they have performed very well so far.

But as said, l will play it safe and top load only.
11 Mar 2015
@ 02:22 am (GMT)

Mal Birrell

Re: Swaging projectiles .375 to .366 (9.3mm)
No worries mate,basically i should have just said that i`ve found them to be soft.
If you`re in Australia you(and i) can get cheap hard cast lead pills from http://www.hrbc.com.au/ in .375 in 245gn for less than $100/500.They should be able to be swaged down to .366 hopefully.Let me know if you want to try some and i`ll post you some.

I own both a 375 and a 9.3 so i`m planning on going the swage route same as you.
Mal
11 Mar 2015
@ 07:57 am (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
I hadn't thought of buying cast pills already made Mal and in fact didn’t know they were readily available!

I don't see why it wouldn’t work very well, being such a small reduction in size. A nice slow mess around load would be fun, but l have heard of guys using cast proj’s to hunt the Sambar. Guess a quick email to Hawkesbury would confirm.
I’m sure l have seen swaging arbours available in the US and most likely here too for sizing them to final dimensions, not sure if .366 was in amongst them though.

Sounds like another adventure may have begun, will do some homework on velocities etc.

Cheers Marty
19 Mar 2015
@ 11:34 pm (GMT)

Mal Birrell

Re: Swaging projectiles .375 to .366 (9.3mm)
LEE makes custom lube/sizer dies for not much money.
Did you hear back from Hawkesbury re velocities ?
I`m happy to send you some to try,i`ve got hundreds of em....
Mal
20 Mar 2015
@ 01:37 am (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
Thanks Mal!

I thought you were going to buy some to try, I didn't realise you already had some, so thanks for the offer. I emailed HRBC and asked what they thought of the Idea? They seemed ok with it using a gas check and are going to send down a couple to try.

They should run through my seizer ok, but yes l did think about the Lee custom Idea as well. Do yours have the gas check already fitted or are you fitting one whilst sizing or not running one?

Back to the 225's, l have been to the range again trying a slower powder to take out some of the snap, but they still seem to recoil harsher than the 250’s & the big 285's which have a nice rolling recoil. So as you can tell this is just a stuff around thing for a bit of fun, trial and well not too much era!
23 Mar 2015
@ 12:33 am (GMT)

Mal Birrell

Re: Swaging projectiles .375 to .366 (9.3mm)
No gas check on mine.I just shot them out of my 375 as they came from the factory.
I tried both trailboss and some old 2206.
Max velocity with trailboss was 1680fps with a case full of powder.
Got up to 2000fps using 46.5gns 2206.

I reckon `felt` recoil is all about the SPEED at which the rifle comes back at....So a lower velocity projectile going out,means a lower velocity recoil into the shooters shoulder.
I try a mild load using 2206h behind the 225`s. You can safely go down to 60% of a max load using 2206h.....Try about 40gns 2206h and see how it feels.
Mal.
23 Apr 2015
@ 02:00 am (GMT)

Mal Birrell

Re: Swaging projectiles .375 to .366 (9.3mm)
Did you try the swaged cast pills yet ?
Mal.
23 Apr 2015
@ 08:51 pm (GMT)

Martin Taylor

Re: Swaging projectiles .375 to .366 (9.3mm)
G'day Mal,

I sent back a reply to hrbc but havent seen any yet Mal. I've had a bit to much on to chase it up again to be honest!
Flat out into hound/stalking season hey!
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