RMR 75 BTHP feedback?

[Random 8]

My service rifle match loads are in a state of flux recently due to the spotty availability of components. Time to experiment !

Anybody have any real world feedback on the above titled bullet Vs the usual Green, Yellow, Red and black box suspects? I like the price and I like their pistol bullets in terms of quality and consistency.

 

[longdayjake]

The 75 has far surpassed the 69 as my favorite match .224 bullet. There are better options for varmints but for high volume longer range stuff I love the 75s. For me, they are much easier to get really good groups. The 69s still shoot well for me, but for some reason the 75s shoot sub MOA with pretty much any load I choose. The 69s seem to take more load development. Could just be my couple of guns but the 75s have been getting a lot of attention lately from guys shooting them in matches. The downside is we have to run the 75s a lot slower because we are fudging the tooling to get it to make that long of a jacket. The jacket doesn't completely clear the final punch before it gets transferred to the clip station so it almost gets tipped over every single stroke. It's pure luck that it even works. When we got the machine they told us that a 69 was the longest it could make and that it was cutting it close as it is.

 

[AJC1]

The 75 has far surpassed the 69 as my favorite match .224 bullet. There are better options for varmints but for high volume longer range stuff I love the 75s. For me, they are much easier to get really good groups. The 69s still shoot well for me, but for some reason the 75s shoot sub MOA with pretty much any load I choose. The 69s seem to take more load development. Could just be my couple of guns but the 75s have been getting a lot of attention lately from guys shooting them in matches. The downside is we have to run the 75s a lot slower because we are fudging the tooling to get it to make that long of a jacket. The jacket doesn't completely clear the final punch before it gets transferred to the clip station so it almost gets tipped over every single stroke. It's pure luck that it even works. When we got the machine they told us that a 69 was the longest it could make and that it was cutting it close as it is.

I'll likely order those for my next 2000, but I really wanted to play with the 69 before the 75 even arrived on the show.... I'd sure appreciate some successful loads to work with. I was playing in the 24-24.4 region with tac on the 69 and seeing just minor differences before you said you used 24.4 so I'm just running with it. In the AR I see no difference.

 

[rdinga]

I have had great groups with 24 grains of Tac and Remington 7 1/2 primers in 3 different AR’s.

 

[ms6852]

I've never used 75gr RMR bullets and am not familiar with them. I do use only Hornady Superformance 75gr bullets use RL15 . In my AR they shoot 5 shot groups sub-moa at 200 yards.

 

[kmw1954]

I have expressed here many times that I had been using the 669gr bullet in a model 10 Savage for short (100-300yd) range target matches. That was until I moved to a Model12 26" barrel and it doesn't like the 69gr one iota. Well that barrel has now about outlived it's useful target life and will most likely move to a 223 with a 1:7.5 twist. Once there I will be trying these 75gr bullets once again.

 

[Soonerpesek]

669gr bullet

Woooo…..
Bet that’s a thumper…. !!

 

[kmw1954]

Woooo…..
Bet that’s a thumper…. !!

Dam near shot my eye out! Yes my keyboard finger stutters.

 

[DMW1116]

Could be worse. Could be your trigger finger.

 

[Random 8]

The 75 has far surpassed the 69 as my favorite match .224 bullet. There are better options for varmints but for high volume longer range stuff I love the 75s. For me, they are much easier to get really good groups. The 69s still shoot well for me, but for some reason the 75s shoot sub MOA with pretty much any load I choose. The 69s seem to take more load development. Could just be my couple of guns but the 75s have been getting a lot of attention lately from guys shooting them in matches. The downside is we have to run the 75s a lot slower because we are fudging the tooling to get it to make that long of a jacket. The jacket doesn't completely clear the final punch before it gets transferred to the clip station so it almost gets tipped over every single stroke. It's pure luck that it even works. When we got the machine they told us that a 69 was the longest it could make and that it was cutting it close as it is.

That's pretty much been my experience with the 75 Hornady as well. The .223/5.56 seems to act more like the famous BR/F class cartridges as the bullet weight increases. I can stuff pretty much any suitable powder under the 75 Hornady in LC brass, seat it to mag length and expect 1MOA groups from my RRA nat match .223Wylde with a 4.5x optic and 5#trigger. Your 75 has some pretty good shoes to fill, but I plan on trying it out!

I've tried a few lighter bullets and had to tweak the loads to find a sweet spot.
Edit @AJC1 , My long time load with the Hornady 75 has been 23.5 Varget, so I'd look at that velocity range with similar speed powders. I've had success with BL-C2, N140, R15, and most recently AA2495 in that ballpark.

 

[W.E.G.]

75 Hornady match bullet is a thinner jacket than RMR and Sierra.