Need OAL Data for MG 55g .223 and Load Data for 75g Hornady

[Trident]

I'm working up some loads for some OBR .223's 1:7, 16" barrel. Mied cases sized and trimmed to 1.750.

The cannular on the MG 55g is about .030 lower than the Hornady 55g so there is no way to get an OAL and stay within the cannular from OEM length of 2.220 to the commonly used 2.250 which seems to be about the max P mag will hold.

I started loading today with BL-C2, H335, but also have Varget, Benchmark, and TAC.

I also have Hornady 55g FMJBT w/C, MG 55g c/C and Hornady 75g BTHP on hand.

Looking for Load Data and OAL for the MG 55 with the short cannulars.... how to get a shorter OAL?

Looking for load data for the Hornady 75g BTHP?

I seen another post on this issue ( that I borrowed the photo from) but nothing seemed to be resolving the issue.

Thanks in advance.

Edited June 17, 2012 by Trident

[Braxton1]

For the Hornady 75, I use 23.5 of Hodgdon VARGET. Makes 2720 FPS out of my 20" and absolutely duplicates the trajectory of a .308 Sierra 168MatchKing.

[RiggerJJ]

Don't worry about the cannular, load to the length the gun wants.

For load data on the 75s, a quick search on all the powder manufacturers online load data pages will yeld you more data than you can use...

I use Varget on the heavies, and 2230 on 55s, right around 24-25gns each, but you will need to start low (23ish) and work up. Don't do any test shots unless you have a CRONO. Find the most accurate at 200 yds that is in the 2700-2900fps area and you are there.

JMHO

jj

[Trident]

I ended up having to load the MG right at the top edge of the cannular at 2.255 -60 and the Hornady at 2.230.

Shot 70 rounds with no failures. The 2.260 are really close at magazine length.

I'm going to call MG tomorrow and see what they are thinking here. Maybe they figure a shorter case???

[Trident]

I'm working up some loads for some OBR .223's 1:7, 16" barrel. Mied cases sized and trimmed to 1.750.

The cannular on the MG 55g is about .030 lower than the Hornady 55g so there is no way to get an OAL and stay within the cannular from OEM length of 2.220 to the commonly used 2.250 which seems to be about the max P mag will hold.

I had them re-design their 55g .223 so that they could be loaded to spec and still be able to use the cannelure. The prior cannula was too low. They have them ready to ship as of today.

Darn spell ckecher thanks 392 ;')

Edited June 26, 2012 by Trident

[392heminut]

I had them re-design their 55g .223 so that they could be loaded to spec and still be able to use the cannula. The prior cannula was too low.

I assume you're talking about the crimp groove in the bullet, which is a CANNELURE;

http://www.thefreedictionary.com/cannelure

A cannula is a plastic tube used in the medical field;

http://www.thefreedictionary.com/cannula

[Trident]

I'm working up some loads for some OBR .223's 1:7, 16" barrel. Mied cases sized and trimmed to 1.750.

The cannular on the MG 55g is about .030 lower than the Hornady 55g so there is no way to get an OAL and stay within the cannular from OEM length of 2.220 to the commonly used 2.250 which seems to be about the max P mag will hold.

I had them re-design their 55g .223 so that they could be loaded to spec and still be able to use the cannelure. The prior cannula was too low. They have them ready to ship as of today.

Darn spell ckecher thanks 392 ;')

Well the new ones are still too low... I guess they mis-calculated by about half the width of the cannelure too low.

[lpspinner]

I had them re-design their 55g .223 so that they could be loaded to spec and still be able to use the cannula. The prior cannula was too low.

I assume you're talking about the crimp groove in the bullet, which is a CANNELURE;

http://www.thefreedi...y.com/cannelure

A cannula is a plastic tube used in the medical field;

http://www.thefreedi...ary.com/cannula

.....that is inserted into a bodily cavity

Thanks, I needed to laugh this morning.

[392heminut]

I had them re-design their 55g .223 so that they could be loaded to spec and still be able to use the cannula. The prior cannula was too low.

I assume you're talking about the crimp groove in the bullet, which is a CANNELURE;

http://www.thefreedi...y.com/cannelure

A cannula is a plastic tube used in the medical field;

http://www.thefreedi...ary.com/cannula

.....that is inserted into a bodily cavity

Thanks, I needed to laugh this morning.

Well, I didn't want to go there but since you brought it up!

[hrt4me]

For the Hornady 75, I use 23.5 of Hodgdon VARGET. Makes 2720 FPS out of my 20" and absolutely duplicates the trajectory of a .308 Sierra 168MatchKing.

thanks, good reference

[jstone]

Do what riggerjj said. As long as you have proper neck tension crimping is not necessary