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

Formidilosus

Super Moderator
Shoot2HuntU
Joined
Oct 22, 2014
Messages
9,885
Mambamag 10 round.

IMG_2638.jpeg


Metal feed lips, follower spring seems quite stiff-
IMG_2637.jpeg


A little shorter than an AI 10 rounder-
IMG_2639.jpeg



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

IMG_2641.jpeg




Mambamag, much higher presentation-
IMG_2645.jpeg




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

hunterjmj

WKR
Joined
Feb 3, 2019
Messages
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Location
Montana
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.
 
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Schmo

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Apr 29, 2023
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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
 
Joined
May 15, 2022
Messages
496
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
 
Joined
Aug 18, 2015
Messages
1,366
Location
Harrisburg, Oregon
@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
 
Joined
Sep 7, 2024
Messages
11
Location
Michigan
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

FNG
Joined
Jul 6, 2024
Messages
25
Location
North Dakota
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

Lil-Rokslider
Joined
Apr 2, 2020
Messages
221
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. 1000013882.jpg
 

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ElPollo

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Aug 31, 2018
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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.
 
Joined
Sep 7, 2024
Messages
11
Location
Michigan
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.
 
Joined
Jul 17, 2023
Messages
35
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

FNG
Joined
Jul 6, 2024
Messages
25
Location
North Dakota
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

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Sep 19, 2021
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SW Idaho
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

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Jan 2, 2023
Messages
92
Location
406
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?
 
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