cart SHOPPING CART You have 0 items
SELECT CURRENCY

Discussion Forums

Search forums

sizing bullets

24 Feb 2015
@ 08:05 am (GMT)

Thomas Kitchen

bit of an odd question has anyone sized down bullets 7mm-270 i know some one on here was going to try to size down to 9.3mm not sure how it went?

Replies

24 Feb 2015
@ 08:08 pm (GMT)

Nathan Foster

Re: sizing bullets
Hi Thomas, Marty who sized from 9.3 down to .375 is staying with us at the moment, enjoying some long range shooting.

This is a very good idea because you can swage the 162gr SST or A-Max from .284 down to .277.

Key points:
Marty found a whack a mole set up better than using a home press. So no need for a threaded die- though marty is using a .222 sizing die reamed to suit.

The ideal die needs to start out at say .285. the entire projectile sits in (base of the bullet below, not flush with the top of the die). The die then tapers down to .284, then down to .277" Length of the .277" section only needs to be 10mm at the most (.400"). The die then needs an open section at the bottom so that after you knock the projectile through the .277" section, the projectile can pass down into a collection section (if that makes sense- like an hour glass).

The punch used to drive the bullet needs to be a relatively close fit with a wide head that stops the punch following the projectile right through and driving it into your work bench.

I think this is something Dave Manson (Manson reamers) could play with successfully if he has the time at some stage. So if you are dead serious, he may be a person to contact. He could make either a reamer or a completed tool. You can use me as a reference if you like- Dave will contact me directly to bounce around ideas if you want to proceed.

The next question is twist rate. A 1:9 twist is more ideal for these projectiles. Velocity can be a major factor- the faster you can drive the bullet, the less need there is for a fast twist (occasionally the opposite occurs depending upon individual bores). I have run 162gr bullets in 1:10 twist 7mm rifles of old. Some work some don't. Would be the same for the .270.

Win or lose, it will be a good project if you wish to pursue it Thomas.
24 Feb 2015
@ 08:11 pm (GMT)

Nathan Foster

Re: sizing bullets
Sorry guys, I need to get out into the hills with Marty so I won't be around much for the next couple of days. Marty is having a great time, shot a few goats, still looking for a pig (in this heat), killed a few rocks out to 1140 yards so far. All good and helping me keep my head in the right place for the final book of the series on field work.
25 Feb 2015
@ 07:19 am (GMT)

Thomas Kitchen

Re: sizing bullets
cheers for that Nathan,
seems to make sense and sounds possible to, would be nice to have amax's for 270.
i got to many projects to tie up my money and time at the moment but will pursue it in future, nice to no some ideas that swirl around between my ears could work haha.
good luck for your hunt hopefully you can video some for youtube??
27 Feb 2015
@ 08:25 pm (GMT)

Nathan Foster

Re: sizing bullets
Tried to get some footage Thomas but the weather was too hot for pigs. Just more goat footage, .308 TTSX at 480 yards versus A-MAX. You can guess the differences. Need to collect more footage out a bit longer and also some 338 Edge footage. But- the film director will get first dibs on clips at the moment, want to make sure he has plenty of B roll to play with.

Yes you are dead right, more youtube footage needed.
28 Feb 2015
@ 02:59 am (GMT)

Thomas Kitchen

Re: sizing bullets
there's seems to be two different idea's on pigs in summer with pighunters i know. some reckon they go high for the breeze the other half seems to think the go down into cool valleys where the water is. i tend to think pigs are to bloody smart and you find them where you find them.

really looking forwards to your hollywood debut, be very interesting to see the comparison footage to.
28 Feb 2015
@ 06:21 am (GMT)

Nathan Foster

Re: sizing bullets
Yes, so true Thomas.

The safest areas in hill country are the same as per deer, at the 3/4 level where the springs start. Offers plenty of cover in the bush, water and a choice of escape routes. We could have gone bush hunting, could certainly hear the animals grunting in the bush. But in this instance we were focused on tops hunting / open country work for ongoing research etc.
 

ABOUT US

We are a small, family run business, based out of Taranaki, New Zealand, who specialize in cartridge research and testing, and rifle accurizing.

store