So do you think my barrel can handle it? They had TAP 62 grain (which I picked up first) but after I was through looking around the store I accidently picked up the 75 grain. Im taking one of my AR’s with a 1 in 9 twist hog hunting and I picked up the wrong ammo and I would hate to spend another 22 dollars for for 20 rounds of ammo!(Im poor after my last build)! Opinions appreciated!!
Only real way is to try a couple and see.
I have a 1/9 twist gun that shoots 75 grain Hornady bullets very well out to 250 yards (farthest I’ve tried). I hear of some 1/9 guns that don’t.
Twist rate varies somewhat in barrels, some 1x9s are closer to 1x8 and others closer to 1x10. As UVvis said just try them. It won’t hurt anything.
You can either call Ms. Cleo and ask, or try the ammo out.
While I would probably try it also, I wouldn’t have time to go to the range without getting ammo I was more sure would work, so stop back at the shop and get the 62 gr just in case. While there, you could always ask to swap them, if you’re not interested in keeping the 75 gr for the “two-way range.”
Sighting in and accuracy testing AND having enough left over to take hunting out a 20 round box should be entertaining…
fwiw … I have a 1/9 upper built in 1995 (Colt 6721 16") that handles both 75gr TAP and 77gr Mk262 Mod O just fine - out to 200yds.
Unk beyond that because I don’t have a local range I can shoot beyond 200yds.
Twist isn’t the only variable. Some barrels just seem to bite the bullet better & work. If on the edge of stabilizing, be sure you use the rd you want, to the max distance you need, in the lowest temp.
Just as a test today, I dug out one of my 1/9 twist carbines and put a couple of mags of 75gr TAP practice ammo through it. Worked fine out to 150yds other than the slight variation in POI over the M193 it was sighted in for.
I have to take off my EOtech to put on a regular scope so when I go to the range in a couple days I’ll sight it in with my 55 gr practice ammo then use my TAP ammo to see how it goes. I’ll more then likely suck it up and buy the 62 gr to see which one works best.
C’mon. Hunting isn’t like a 3-gun match. You shouldn’t need to carry more than one or two rounds depending on the size of the hog and the bag limit. Right? 
That should leave you about 16 rds from the first box to T&E.
Don’t ruin your chance on a hog hunt. Try some of the 75 gr stuff for accuracy and if you’re not satisfied, spend another $22 to find out which round is better.
Good luck and don’t forget to share the sausage!!!
-B
evilmonkey,
As already suggested 1/9 bbls are individuals at that weight. My Colt M4A1 1/7 loved Mk 262 77gr ammo but my Oly 1/9 bbl didn’t. Only way to be sure is to have your rifle shoot some ammo at the distance that you require.
CD
Im going to go ahead and by a box of the 62 gr ammo just for the hell of it! Im going to need more ammo anyways I found out today that the place we are going to is full of hogs and its screwing up the guys land that we are going to so we are going to kill as many of them bastards as we can! Glad I have a lot of room in my freezer;)
TAP 75 Works fine out of my 1/9.
For the 62gr TAP, are you talking about their “barrier” ammunition? If so, i’d have to ask if you’re planning on engaging vehicles. Otherwise, the 75 is a better selection.
Wait a minute, wait a minute. I can’t believe what I’m hearing…I thought 1:9 was a POS and 1:7 was a MUST HAVE?
So I went to the range today and all went very well with the 75 gr TAP! On the way their I picked up a box of the regular 55 gr Hornady ammo just in case the 75 gr were to heavy! I also had 55 gr practice ammo and 45 gr Varmint hollow points that Ive had for a while. The 75 TAPs were hitting less then 1" groups at 100 yards, The 55 gr Hornady’s were at about 1" to 1.25" groups at 100 yards. The 55 gr practice were also about 1" to !.25", the 45 gr were about 2" to 2.5" groups. I guess the 1 in 9 barrels arent so bad after all;)
I prefer 1/7 for mine but quite honestly it wouldn’t matter to me - I probably wouldn’t be able to tell the difference between it and a 1/9.
I prefer the 1 and 7 to but not because of the accuracy. I think the 1 and 9 is just as accurate as my 1 and 7 barrels but most of the barrels that are 1 and 7 are made from 4150 steel and that to me is more important.
Just a little FYI that I am sure most of us know. I zeroed my ACOG using 62gr. Milspec and then tried the Black Hills Mk262 MOD 1 ammo. There was a definite difference in the point of impact. The Mk262 shot about 2 feet higher than the 62gr. Just something to take into account when switching various types of ammo/ optics.
What distance are you talking about? A two foot difference in POI would indicate a serious problem at 100 meters. Did you mean two inches? Or perhaps a longer distance? Just curious really.
Your point about the difference in point of impact is a good one. I’ve found that there is as much likelihood of a windage difference as there is an elevation difference when using different ammunition. In other words, a heavier/lighter bullet does not always hit either lower or higher but can go right or left too(sometimes to a substantial degree).