.223 for bear, mountain goat, deer, elk, and moose.

[Formidilosus]

Mambamag 10 round.




Metal feed lips, follower spring seems quite stiff-



A little shorter than an AI 10 rounder-




Factory 4 round magazine. Look at amount of base that is presented to the bolt face (black marker is line from Mambamag)-






Mambamag, much higher presentation-





Dry cycling feeds fine. Will see about live soon enough.

 

[Schmo]

@Pharmseller,
Please let us know how those new MT mags function.

 

[hunterjmj]

73 ELDM vs 77 TMK. Bought a RSS along with all the dies, specific tools and components to start loading the 77tmk's but in the meantime I've been shooting the factory 73 elm's with nothing but great results with an antelope and an elk. Is there an advantage to shooting the tmk over the eldm?
I'm committed to the tmk now that I have 1000 bullets but dang, that eldm is impressive.

 

[Schmo]

From everything I’ve read, the 77TMK will be more impressive. If all goes as planned, I’ll be getting personal experience in a couple weeks

 

[Brontosaurus]

Mambamag 10 round.

View attachment 783331


Metal feed lips, follower spring seems quite stiff-
View attachment 783332


A little shorter than an AI 10 rounder-
View attachment 783333



Factory 4 round magazine. Look at amount of base that is presented to the bolt face (black marker is line from Mambamag)-

View attachment 783338




Mambamag, much higher presentation-
View attachment 783336




Dry cycling feeds fine. Will see about live soon enough.

Have two sitting in my cart

Say the word and I cop

 

[Pharmseller]

@Pharmseller,
Please let us know how those new MT mags function.

Received 5, 2 are my brother’s, so I tested 3. A full magazine (4) each, one time only.

Two fed flawlessly, but the third did not pick up the second round, despite working the bolt multiple times. I removed the magazine, pushed down on the top round a few times, reinserted, and the next 3 fed without issue.

I reloaded the magazine and tried again, all 4 rounds fed without a problem.

The magazine was properly inserted each time, so the malfunction was not due to an improperly inserted magazine.

I marked the follower on the suspect magazine for further testing.




P

 

[Mideerhunter]

Hey guys, has the quality of the aac 77tmk improved or is it still so so? I have seen some people say that the quality is horrible and I'd rather stick to 73 eld-m if that is true. Also, has anyone ever tried the pmc 77 otm's?

 

[KJ_ND]

Hey guys, has the quality of the aac 77tmk improved or is it still so so? I have seen some people say that the quality is horrible and I'd rather stick to 73 eld-m if that is true. Also, has anyone ever tried the pmc 77 otm's?

My first batch of TMKs was pretty bad. Multiple FTFs and case failures. Second batch hasn't been bad. SDs in the low 20s out of a gas gun. Factory eldms are around 10-15 for comparison. I ran around 100 otms they ran hot but reliable close to IMI 77gr numbers. I plan on grouping this batch of tmks and keeping my shoots 200 and under for deer this season.

 

[Gettincloser]

It is not a large sample size but this string had 24fps standard deviation in the mix. The overall speed is the same as what i saw out of the Black Hills ammunition. The difference is the Black Hills ammunition (for me) was a standard deviation of only 11fps!

Either way, I think you would be well less than minute of vitals at effective velocity ranges.

I added the larger sample size of the Black Hills string for reference.

 

[Gettincloser]

Not sure whu I have 1 big picture and one little picture... but they are different data sets!

Sorry about that.

 

[ElPollo]

Hey guys, has the quality of the aac 77tmk improved or is it still so so? I have seen some people say that the quality is horrible and I'd rather stick to 73 eld-m if that is true. Also, has anyone ever tried the pmc 77 otm's?

In my Tikka it’s about 70 fps slower than Black Hills and 20-shot groups are maybe a 1/4-1/2” larger. It’s also half the cost. The differences in accuracy and speed don’t amount to a hill of beans for field shooting and hunting. It prints center but about 0.1 mil low at 100 compared to my BH zero. Besides, you can find it and you can’t find the BH. Buy it, shoot it, rejoice, repeat.

 

[Mideerhunter]

Ok, thanks. Now would you guys rather hunt Michigan deer with factory 73 eld-m or AAC 77tmk?

In my Tikka it’s about 70 fps slower than Black Hills and 20-shot groups are maybe a 1/4-1/2” larger. It’s also half the cost. The differences in accuracy and speed don’t amount to a hill of beans for field shooting and hunting. It prints center but about 0.1 mil low at 100 compared to my BH zero. Besides, you can find it and you can’t find the BH. Buy it, shoot it, rejoice, repeat.

 

[ElPollo]

Ok, thanks. Now would you guys rather hunt Michigan deer with factory 73 eld-m or AAC 77tmk?

Both will keel. The AAC is cheaper, the ELDM might be more consistent if you were shooting past 400. Seriously doubt you are doing that in Michigan.

 

[BlackHillsShooter]

Hey guys, has the quality of the aac 77tmk improved or is it still so so? I have seen some people say that the quality is horrible and I'd rather stick to 73 eld-m if that is true. Also, has anyone ever tried the pmc 77 otm's?

My first and last experience with AAC 77TMK was not good. Cases splitting, gas in my face, primers lifting. I did try but found about 40% failure rate on that batch. I pulled bullets and found mixed powders. Reloaded a few with my powder and cases were still splitting. Not even close to a max load. This was in a 223 chambered Tikka and a Wylde barreled AR15. Same failures in both firearms.

They didn't respond to me when I told them so I'll walk with my money.

 

[KJ_ND]

My first and last experience with AAC 77TMK was not good. Cases splitting, gas in my face, primers lifting. I did try but found about 40% failure rate on that batch. I pulled bullets and found mixed powders. Reloaded a few with my powder and cases were still splitting. Not even close to a max load. This was in a 223 chambered Tikka and a Wylde barreled AR15. Same failures in both firearms.

They didn't respond to me when I told them so I'll walk with my money.

This was my first batch they didn't respond until I posted it on Reddit and they messaged me after the thread exploded lol. Second batch has been fine but I've got tmks to reload now so this is probably my last batch.

 

[Matt5266]

Ok, thanks. Now would you guys rather hunt Michigan deer with factory 73 eld-m or AAC 77tmk?

As ElPollo said, I'd pick which ever you want. In Michigan I'd assume your shots are not super far. So I'd pick whatever is cheapest with a decent grouping. They will both kill fine. TMK is said to have a little more penetration (what I've seen on here, I have not done testing) but if one shoots a 1 inch group and one shoots a 1.5 inch group. Its irrelevant at a couple hundred yards.

What I'm getting at is either will be good to go at about 400 yards or so like ElPollo said haha.

 

[turbo406]

Mambamag 10 round.

View attachment 783331


Metal feed lips, follower spring seems quite stiff-
View attachment 783332


A little shorter than an AI 10 rounder-
View attachment 783333



Factory 4 round magazine. Look at amount of base that is presented to the bolt face (black marker is line from Mambamag)-

View attachment 783338




Mambamag, much higher presentation-
View attachment 783336




Dry cycling feeds fine. Will see about live soon enough.

Do these allow for longer coal?

 

[Reddish]

Do these allow for longer coal?

I was going to ask the same…in case I get a wild hair and want to load some 88gr ELDMs.

 

[Schmo]

Do these allow for longer coal?

No, limited to 2.337” COAL

 

[Schmo]

I’ve got one of the new MT 223 mags on order. I’ll report back how it works.