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Posted: 3/2/2006 6:15:11 PM EDT
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I just wanted something cleared up. What is the difference between an OTM round like the 75 GR TAP and the 77 GR MK262 Mod 1 from Black Hills? I spoke with someone from Blackhills and they told me that the JHP rounds don't act like regular Hollow-point rounds (meaning that they don't mushroom out). That totally confused me because I thought that is exactly what they were designed to do. The reason I am asking this is because I am in Law Enforcement and I want a round that is super accurate and will do the job. So basically my questions are? 1. Do the Hornady 75 GR TAP rounds mushroom out like 9mm hollowpoint rounds? 2. Does Match ammo like the 77 Sierra Match make a good Law Enforcement Round? What happens when they hit flesh? Do they act like FMJ rounds or do they Mushroom out or something else? 3. Is the 75 GR TAP the best round for LE? Thanks in advance for everyone's help. Really appreciate it. |
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It’s my understanding that these hollowpoints don’t mushroom, they fragment. Because of the way most rifle bullets are shaped (heavy end to the rear) they tend to flip 180 degrees when they hit flesh. If the jacket is light enough and the velocity is high enough the bullet will break up when it gets to about 90 degrees. The bullets you mention supposedly fragment at a lower velocity than the standard 55 grain FMJ bullet. Of course they are heavier and have a lower muzzle velocity (in similar pressure cartridges) than the 55 grain round, but they still fragment at a greater distance than the 55 grain 5.56mm (M193) round. |
www.ammo-oracle.com 
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groups.msn.com/TheMarylandAR15ShootersSite/556performance.msnw Here's part of the article: "In .223, the 75 gr TAP is one of the best performing bullets in this caliber, as demonstrated in the lab, as well as confirmed by multiple law enforcement and military shooting incidents. The .223 40 gr and 60 gr TAP bullets seem to offer inadequate penetration. [This round will work out of a 1:9 twist barrel, but is probably better out of a 1:7 twist.]" |
That is what I was shooting, the 5.56 version from Hornady directly. I paid $100 for 200 rounds. I just ordered 500 rounds of the HSM rounds which are loaded with the 75 GR TAP round. I paid $200 for 500 rounds. I don't know if they are .223 or 5.56, but they are definitely less expensive. I'll just have to see if they are as accurate. I checked out the Ammo-Oracle site a while back and it was there that I got the impression that the HP rounds mushroomed out. |
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Here is a good read for you on ballistics of the Hornady TAP 75 www.btammolabs.com/tests/5.htm |
| Wow. Amazing info from bith sites. I will have to check out the Hornady practice rounds. Do you know the price off hand and if they are reloads? Also, has anyone heard if the HSM rounds are any good? At least I am on the right track with the Hornady 75 GR TAP. It looks like they are great bullets and compare very well to the MK 262 Mod 1. |
They're $110 for a case of 500. I'm assuming they're reloads, like Black Hills Blue Box, but at about half the price of the Black Hills. I'm going to pick up two cases tomorrow and I'll let you know how they are. |
Thanks for the info, I'll give them a try next. Just as soon as I get rid of the one's I have. I bought 1000 rounds of the cheap 62 GR from Natchez just to practice with. |
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In regards to better understanding OTM (Open Tip Match) vs true/regular Hollow Point you should read the following link: www.thegunzone.com/opentip-ammo.html Yes, it is alot to read at one time, but it explains the difference in detail very good (IMHO). he |
Thanks for the info. Very good reading. Not like I got anything else to do. I'm just sitting on my ass recovering from hernia surgery. SO feel free to send more stuff for me to read. 
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