Mag Tech 230 Gr. FMJ testing.

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Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Sun Nov 13, 2011 9:31 pm

We had a fairly nice day today so I grabbed the gear and set up my Chrony to test some more 230 Gr. Mag Techs loads that I worked up earlier this afternoon. However, I forgot about it getting dark earlier so I think my Chrony got cranky after the first shot and only gave me errors so I stopped and will continue the tests tomorrow. Here are the results so far.
20" Barrel
Brass- Hornady
Primers- WSR
Bullet- Mag Tech 230 Grain FMJ
COL- 2.13"
Powder 40.0 Grains Lil Gun.
Taper crimped to .476" then LeGender crimped
just below case mouth.
Four Rounds fired
FPS
2414
****
****
****
range 50 yards
Moderate sooting.
Last edited by Texas Sheepdawg on Tue Nov 15, 2011 7:53 pm, edited 3 times in total.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Colohunter » Mon Nov 14, 2011 12:40 am

16 or 20" barrel? I have been wanting to try FMJs but haven't had a chance yet. I'll be looking forward to your results.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Mon Nov 14, 2011 11:05 am

Colohunter wrote:16 or 20" barrel? I have been wanting to try FMJs but haven't had a chance yet. I'll be looking forward to your results.

20" Barrel. I started a while back at 38 Grains, but I really did not like the performance. I had a few hangfires, but then again, I was also not using the Legendre Crimp.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Mon Nov 14, 2011 2:54 pm

Spent the morning out on the range testing the remaining workup loads. Not sure what was going on, but velocities were all over the place. Accuracy was not great either. Will post results later after I have looked at results. I think the main problem is my shooting table has about had it. It was very wobbly and even the Grendel groups were not quite what one would normally expect at 50 Yards. I did finally get the table stable enough to put 7 450 Bushmaster 250 Grain FTX factory rounds right on top of each other and I also took the opportunity to Chrony them. Lots of Data... So Little time.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Tue Nov 15, 2011 8:17 pm

Here are the results of the Mag Tech 230 grain FMJ.
20" Barrel
range 50 yards
Brass- Hornady
Primers- WSR
Bullet- Mag Tech 230 Grain FMJ
COL- 2.13"
Powder Lil Gun.
Taper crimped to .476" then LeGender crimped
just below case mouth.
Chronogragh set at 12 feet away from muzzle.
--------------------------
40.0 Grains
FPS
2414
****
**** Chronograph ran out of light.
****
Moderate sooting.
Image
---------------------------
41.0 Grains
4 rounds
FPS
2462
2430
2497
2490
AVG 2469.75
Mild Sooting
Image
--------------------------
41.5 Grains
3 rounds
FPS
2544
2502
2389 this round sooted.
AVG 2478.33
very little sooting except for one round. I will probably re-test this loading.
Image
-------------------------
42.0 Grains
4 rounds
FPS
2402
2448
2509
2323
AVG 2420.5
trace sooting
Image
------------------------
43.0 Grains
4 rounds
FPS
2420
2419
2516
2525
AVG 2470
mild soot.
Image
-----------------------
I shot 7 rounds of factory 250 Grain FTX as a followup
7 rounds
2186
2214
2187
2172
2204
2203
2161
AVG 2189.571
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Re: Mag Tech 230 Gr. FMJ testing.

Postby jamesgang » Fri Nov 18, 2011 3:20 pm

Damn, it looks like we shouldn't mess with shooting anything but factory loads. That's an awesome group.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Fri Nov 18, 2011 7:08 pm

Yeah, but remember, I was more focused on not blowing up my Chrony than grouping at this time in the workup. I am looking for velocities and pressure signs and functioning reliably. Once I start seeing lower SDs and stable velocitys, then I believe I can get the same performance as the factory if not better. Next batch will start at 41.5.
For some reason in my rifle, 38 grains was causing hang fires.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Wed Nov 30, 2011 9:13 pm

Take my Chrony data and run it through this calculation, the Taylor KO factor.
http://www.beartoothbullets.com/rescour ... 4&cal=.451

A Taylor KO Value of 36 with a bullet that weighs 230 grains, a velocity of 2450, and a diameter of .451.
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Re: Mag Tech 230 Gr. FMJ testing.

Postby wildcatter » Thu Dec 01, 2011 5:43 am

Texas Sheepdawg wrote:Take my Chrony data and run it through this calculation, the Taylor KO factor.
http://www.beartoothbullets.com/rescour ... 4&cal=.451

A Taylor KO Value of 36 with a bullet that weighs 230 grains, a velocity of 2450, and a diameter of .451.


Ok, to put that into perspective. The M16 at the muzzle, with a 55gr-fmj @ 3200, is pretty ferocious, again with the muzzle pressing right up against your chest. That 5.56 has a TKO of 5.6 TKO units at the muzzle. For Tex's 230gr loading to finally bleed down to 5.6 TKO units, he'll be at about 1700yds. In other words, comparing the two, they will kill approximately the same, when comparing the M16 @ the muzzle and the Tex loading @ 1700yds!!! This is not just theoretical either, the ARMY WOUND BALLISTICS CENTER, spent allot of time and years of effort verifying this, they found, because of the plethora of variables, that there is no perfect formula, but Taylor Knock out (TKO), more than puts them into the ball park, and is very instructive at ruffing-in trends, solutions, and conclusions. This is why nearly all of the front-line ballistics outfits use Taylor Knock Out, as a predictor of "Probable" (as in, Not Conclusive) Terminal Results.

As a further comparison, the Tex Load is at 38 TKO units, right? Well, guess what? The overwhelmingly successful and proven elephant killer, known as the 375H&H, when corrected for a 16 inch barrel (Tex's chosen poison), the 450b vs the 375H&H is a wash, 38 vs 38.8 TKO's, respectively..

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Re: Mag Tech 230 Gr. FMJ testing.

Postby Texas Sheepdawg » Wed Jan 11, 2012 2:00 am

Wildcatter wrote....
As a further comparison, the Tex Load is at 38 TKO units, right? Well, guess what? The overwhelmingly successful and proven elephant killer, known as the 375H&H, when corrected for a 16 inch barrel (Tex's chosen poison), the 450b vs the 375H&H is a wash, 38 vs 38.8 TKO's, respectively..


Sorry, Tim. I thought I told ya but maybe I forgot, my thumper is a 20" pipe. Would that change anything?
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