RMR 69 gr OTMs

[tomme boy]

Slam fires can and do happen in the AR rifles. Ever see a round you chambered then ejected. Well, LEO's are chambering the same round over and over. Each time that firing pin hits the primer. Till one day it lites it off. It happens a lot more than is told as noone wants to be that guy that shoots a hole through something so it is not reported unless it is seen by someone else.

CCI 400 primers are not made for loads over 45K psi. They are made for the 30 carbine and 22 hornet. You can use them and get away with it if your parts are not made over sized(rem 700) and you don't load 556 pressures

[markm]

Billions of rounds are fired in ARs each year. The majority of the ammo doesn't have Magnum primers.

Slam fire in an "IN SPEC" AR is not at thing. Re chambering a round leaves a dimple which, if anything, will hurt the ignition reliability.

Guys here have posted accounts of re chambering a round for patrol in Iraq so many times, that it didn't go boom when they fired it.

[308sako]

While I know I am Late to the party, just ordered 1K of the 69 grain OTM's. Going to use TAC and XBR, and advice form those seasoned with this particular bullet?

[MarshallDodge]

While I know I am Late to the party, just ordered 1K of the 69 grain OTM's. Going to use TAC and XBR, and advice form those seasoned with this particular bullet?

I wouldn't waste your good 8208XBR on these bullets.

The 69 3GH with 23.8- 24.3 grains of TAC works well in my rifles.

There have been several reloaders saying that a shorter seating depth matters. 2.260" COAL worked the best in my setup but don't let that stop you from testing shorter depths.

[markm]

I agree. TAC is your powder. I don't mess with seating depth ever for any load. Life is too short to add that torture to my process. I think the RMRs (both 75 and 69) seem to enjoy a fast twist and velocity.

I'm just speculating, but we shot 3 loads in 2 bolt guns, and the faster twist and longer barreled gun shot a little better.

[308sako]

Bullets arrived and I'll start with TAC, and Federal 205's and CCi 450's
The question for me is which of my rifle(s) to begin with :-)

[MarshallDodge]

What are you guys seeing for accuracy when comparing the 69 vs thr 75 RMR bullets?

As you have seen, I tried the 69 in several of my guns. The best I could get out of them is around 0.7 MOA in my 1:7 Krieger barreled bolt action but shot more like a 55 FMJ in my other rifle with the Remage barrel.

A few weeks ago I decided to give the 75 RMR a chance in the Remage rifle and was able to get two sub MOA 5 shot groups. I'm going to turn the load up another grain and try to get out with it tomorrow.

[markm]

What are you guys seeing for accuracy when comparing the 69 vs thr 75 RMR bullets?

You know? The weird thing is (not sure if I already posted this), we'd sidelined the 75s for perceived poor accuracy, but when we revisited them with 3 loads tested in two different guns, the 75 were very respectable.

Our standard test gun (rem 700 5R bolt gun) didn't like the H322 load we tried, so I unfairly blamed the bullet. But other powders and another gun all shot pretty good. I don't have the exacts in front of me, but Pappabear ordered another 2k based on what we found.

[BuzzinSATX]

I continue to be very happy with the 75’s and keep forgetting to get pics.

I am buying another 8 lbs of N140 as it’s a very consistent and successful (for me) powder for both .223 75’s and .308 168’s.

I’ve been using Winchester SRP 41’s and they are working fine.

YMMV.


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[MarshallDodge]

I continue to be very happy with the 75’s and keep forgetting to get pics.

I am buying another 8 lbs of N140 as it’s a very consistent and successful (for me) powder for both .223 75’s and .308 168’s.

I’ve been using Winchester SRP 41’s and they are working fine.

YMMV.


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Thanks for the feedback, guys.

I really like N140. Some of my best groups with the 77 SMK are with that powder.

N133 is what I am shooting behind the RMR 75s. It's on the fast side for that heavy of a bullet but I am hoping it does well in the 11-16" barrels. One of the shooters at the local range swears by it in his AR.