17/23 SMc

[jcm24m]

Have any of you shooters built a 17/23 SMc ? Tell me what you like or dislike about it. Also what are your powder loads you use after they have been fireformed. THANKS

 

[Tommie]

Do you own one?

 

[jcm24m]

No, not yet, but barrel - dies - and all that is needed is ordered thru the gunsmith. I will be using a Savage model 12 LRPV 223 right bolt & left port as the donor rifle. I talked to M.L. McPherson and he got me pointed in the right direction. It should be ready for my first trip this spring P-dogging.

 

[spencerhenry]

what is it? Tried to look it up but found nothing.

 

[swd]

If I recall correctly it was designed by an engineer that designed rocket engines and has a radiused shoulder. Cool looking but never showed any advantage over a standard shoulder.
https://en.wikipedia.org/wiki/5_mm/35_SMc

 

[thekriebles]

what is it? Tried to look it up but found nothing.

Left to right: 17 Rem., 17/23 SMc, 17 Mach IV

 

[jcm24m]

The 17/23 SMc is made by fireforming a 17 Fireball to blow out a front radiused shoulder as the picture above shows.

 

[AJC]

What is the difference between a SMc and an Ackley cartridge.

 

[thekriebles]

What is the difference between a SMc and an Ackley cartridge.

Most noticeable are the case shoulder differences. The SMc cases have a "Hemi"-type shoulder or a parabolic shoulder. Whereas, the Ackley design is sharp/straight and angled at 40°. (Edit): ...forgot I had one of the 40° versions. Here's a photo comparison:

 

[Big Mc]

Have any of you shooters built a 17/23 SMc ? Tell me what you like or dislike about it. Also what are your powder loads you use after they have been fireformed. THANKS

I have a 17-223 it loves 4198 .20 or 25 pills.

 

[sscoyote]

Yeah I remember reading about the SMc cartridge in TVHM several years ago. It was designed by a certain Smalley and Mic McPherson who used to write a bunch in TVHM. Good writer/tester/experimenter I thought. Lives down in SW Colo. May try and get ahold of him. I called him once years ago--nice guy. I can look those articles up in TVHM if you'd like. Send a copy to you. Let me know.

 

[jcm24m]

I have a 17-223 it loves 4198 .20 or 25 pills.

The 17/23 SMc is built off of the 17 Fireball and NOT the 223 case.

 

[jcm24m]

Yeah I remember reading about the SMc cartridge in TVHM several years ago. It was designed by a certain Smalley and Mic McPherson who used to write a bunch in TVHM. Good writer/tester/experimenter I thought. Lives down in SW Colo. May try and get ahold of him. I called him once years ago--nice guy. I can look those articles up in TVHM if you'd like. Send a copy to you. Let me know.

Sent you a PM

 

[sscoyote]

Found it--TVHM Issue 80-10/2011, "Maximum Performance With Minimum Fuss: 17/23 SMc, an Improved 17 Fireball".

 

[powderbrake]

The Smc also has some ratio of bore diameter to case diameter, so you cant make every caliber because they all need different case diameters. ( As I remember from reading Varmint Hunter a few years ago)

 

[Big Mc]

The 17/23 SMc is built off of the 17 Fireball and NOT the 223 case.

I have a 17-223 NOT a SMc 17=223 Made from a 223 NOT a Fireball

 

[jcm24m]

TTT

 

[jonbearman]

I have a 20 smc basically a 6 br necked to 20 cal with the parabolic shoulder and it is a hell raiser. Super accurate. Technically a 5.35 smc and it loves the 40 grain bergers.

 

[Kurz]

Yes, I know this is an older thread. Thank you!

Just for fun and comparisons:

 

[Big Mc]

Have any of you shooters built a 17/23 SMc ? Tell me what you like or dislike about it. Also what are your powder loads you use after they have been fireformed. THANKS

I have a plane jane 17/223. Likes IMR 4198. With 20 25 and 30 Bergers . Too bad Berger stoped making the 30s.. Only have 400 left. Tommy Mc