This is an interesting post.
Frank's a good guy, but I think his statement "the military listened to the wrong guys and tried over twisting everything" is a bit misleading. Lots of factors come into play, it's not as simple as saying fast twists don't shoot well at close range. It's kind of like the whole DI guns being more accurate than piston guns argument. I've seen very inaccurate DI guns and very accurate piston guns, and vice versa. There's been testing, lots of testing, much of which isn't available to the general public. There are a number of organizations that have tested and vetted the fast twist concept over the course of several YEARS. They didn't just listen to some chump off the street and take their word for it.
For a 12" gun, I wouldn't go any slower the 1:8" twist, for both exterior and terminal ballistic benefits. Doesn't mean a slower twist will be inaccurate, but it won't offer the same benefits as a fast twist from such a short barrel length.
This is an interesting post.
USP Tactical .45acp
HK 416 10.5" upper
HK45T (OD Green)
One of my threads was an AAR of the class. My buddy was videoed making a 1,000M shot even though he had never shot farther than 100M in his life (mostly deer hunting).
I own two MR762s. One I left at the original barre length. The other I chop down to 13”. Love dem both.
Beat of luck to you bro. Hope u enjoy your HK!
Read some tests on Sig 716 with their 10‘‘ twist. They seem to the get their best results with 168 grs bullets. Just like the HK. Groups were sometimes opening up with heavier bullets.
So a 10‘‘ twist does not seem to be a guarantee for better groups with heavier bullets.
I think I will go for the MR.
It feels and looks like much better quality compared to the 716.
@Drooler : do you have link to your thread? I‘d like to read it.
Thanks again to all for helping me making a decision.
I have shot FGMM SMK 175s in my HK MR762A1 past 900 yards and consistently achieve over a 70% hit rate on 16" metal plate in low wind. However, when shooting past 950 yards, I switch to the Hornady Superformance 168 Grain ELD Match due to its higher speed and better BC. If the wind picks up, I put the HK away and switch to my bolt action 6.5 creedmoor. On both rifles I use a Vortex Razor hd gen ii 4.5-27x56 mounted on a Geissele 20 MOA mount and Atlas Bipod. Under 600 yards, I use the FGMM SMK 168 grain.
I keep wanting to try out the 175 FGMM SMK's but the 168 FGMM SMK and BH 168 SMK's do so well out of my MR762. I got a 20MOA super precision mount for the Steiner T5Xi 3-15x50 and I'm hoping to stretch out the range a bit. It really does love the 168's so I'm on the fence on what to zero the rifle with. I've also got a huge cache of 168's and zero 175's so that might make the decision for me. And realistically I'm not sure I'll ever be able to shoot at 1000 yards. We'll see.
If it's an HK I probably want one.
I BACK THE BLUE
I totally agree on the 168s....shoots great out the MR762A1. That is what I have my Vortex Razor zeroed with. The FGMM 175s hit 1" higher at 100 yards. The Hornady Superformance 168 ELD-M have same zero as the FGMM 168s.....so not a big deal with any of these, easy math. On the Ballistic AE app, you can even set the offset so when you pull up the 175s it will subtract 1 MOA from what you need to dial. I primarily have 168s.....both Hornady and Federal. The Federal is cheaper, so I only use the hornady for longer shots.
I tried the Black Hills 175s when I first got the rifle and they did not work as well for me as the FGMM. They were ~100 ft/s slower than the FGMM 175s and had a higher Standard Deviation. I may give them a try again and re-clock them. I just picked up a Lab Radar on sale at Brownell's for $450 so I will compare with the measurements I had from my Magnetospeed.
Very interesting read. Thank you very much
Today I told my boss the MR308 is mine. He agreed. Now , besides my MK23, I am a proud owner of a HK firearm. Pics to follow. Thanks to all for your help and advice