53gr Superformance out of 12.5” 1/8 ?

[Eurodriver]

I’d like to get something that shoots a bit flatter when hunting coyotes then my 64gr GDHP (which is almost depleted anyway) I would love to be at 250 yards and in with distance. The problem is when using 2D thermal ranging is difficult so the flatter the better.

Is a 53gr projectile traveling out of a 12.5” going to have stability issues?

Using the below, it looks like at 2800fps you want to be above 60gr for 1/8. Funny enough M193 isn’t in the 1.5-2.0 stable range at all with any twist.

What are your thoughts? Any ammo recommendations?

https://www.ar-15lowerreceivers.com/product_images/uploaded_images/gyroscopic-factors-556-nato-223-remington.jpg

[markm]

The flattest shooting round in 5.56 is Black Hills 69 gr 5.56 TMK. FREAKINSHLY flat shooting with a long reach.

[Eurodriver]

The flattest shooting round in 5.56 is Black Hills 69 gr 5.56 TMK. FREAKINSHLY flat shooting with a long reach.

Out of a 12.5”? Won’t a 69gr bullet be slower out of an SBR (and thus drop more) than a faster 53gr?

I’m only trying to shoot 250y

[Vegas]

Out of a 12.5”? Won’t a 69gr bullet be slower out of an SBR (and thus drop more) than a faster 53gr?

I’m only trying to shoot 250y

I feel like it couldn’t be too more than an inch and half of drop at that distance if zero’d at 100? This has me curious. I just checked my calculator and the closest load for my 12.5 I have is Hornady 75gr at 2631. Drop was 3.3 moa at 250.

[Eurodriver]

I feel like it couldn’t be too more than an inch and half of drop at that distance if zero’d at 100? This has me curious. I just checked my calculator and the closest load for my 12.5 I have is Hornady 75gr at 2631. Drop was 3.3 moa at 250.

With 64gr GDHP at 2603fps I’m dropping about 8.8” at 250. I’d love to cut that in half and aim for the top of the back and never have to worry about range.

[Vegas]

With 64gr GDHP at 2603fps I’m dropping about 8.8” at 250. I’d love to cut that in half and aim for the top of the back and never have to worry about range.

Must be the lack of humidity and altitude where I’m at. I typically shoot around 3300 ASL. I forget I’m blessed in that way.

[gunnerblue]

Also consider that the 53 gr. VMAX has a very thin jacket that may come apart with the higher rpm imparted by the 1-8" twist. Of course, the relatively short barrel will keep your muzzle velocity down.

Hornady has another super performance load with a 55 gr. monolithic that might hold up better.

[ST911]

The flattest shooting round in 5.56 is Black Hills 69 gr 5.56 TMK. FREAKINSHLY flat shooting with a long reach.


Out of a 12.5”? Won’t a 69gr bullet be slower out of an SBR (and thus drop more) than a faster 53gr? I’m only trying to shoot 250y

There's some serious magic dust in that 5.56 69 TMK.

[Eurodriver]

There's some serious magic dust in that 5.56 69 TMK.

I might have to get a few boxes and check it out. I know you and markm shoot so it isn’t on deaf ears.

[markm]

The superperformance ammo's accuracy is awful too. Pappabear actually bought a box, and we shot it on paper. I think it was close to 2 MOA out of a good gun with great glass.

[jstone]

The stability should be no issue, but like MARKM said accuracy blows out of all the superformance I have tried. The superformance has problems with shorter gas systems, it's been a while but the burn rate of the powder should only be used with RLGS from what I remember. All the Vmax loads are usually great, if you reload there's a few more options.

[Pappabear]

The stability should be no issue, but like MARKM said accuracy blows out of all the superformance I have tried. The superformance has problems with shorter gas systems, it's been a while but the burn rate of the powder should only be used with RLGS from what I remember. All the Vmax loads are usually great, if you reload there's a few more options.

Yea, I'd try the Vmax cartridges, they shoot very accurate and should be flat. Like Mark said the Super dog shit was just that. YMMV

PB

[Eurodriver]

24.8gr XTerminator
69gr SMK
CCI450
LC Brass
2.260” COAL

2635 FPS out of a 12.5”. The drop is to within 1” the exact same as the .223 Speer 64gr GDHP at 300y. Thought it would fly much flatter.

I am shooting nice 0.89” 5 shot groups at 100y with it though. So that’s nice.

Should I try the 55gr VMAX?

[Pappabear]

Vmax has been great when Mark loaded them. I would def give them a try.

PB

[308sako]

I shoot an 11.5" SBR with 55 V-max @ 2800 ft/secs. This load has accounted for many desert coyotes. What I found was how close it matched the reticle in my TAO1NSN ACOG if I substitute yards for meters! Never more than 1" off the POA vs POI.

[308sako]

The flattest shooting round in 5.56 is Black Hills 69 gr 5.56 TMK. FREAKINSHLY flat shooting with a long reach.

Not to hijack the thread but have you chronographed this load?

[Pappabear]

Not to hijack the thread but have you chronographed this load?

We chromo's some loads and they are in my Phone, being a dumbass I didn't note the 69 vs 77 loads. However I had 2827fps and 2843fps on another load. I think that was via 20 inch bolt gun.

PB

[308sako]

The flattest shooting round in 5.56 is Black Hills 69 gr 5.56 TMK. FREAKINSHLY flat shooting with a long reach.


We chromo's some loads and they are in my Phone, being a dumbass I didn't note the 69 vs 77 loads. However I had 2827fps and 2843fps on another load. I think that was via 20 inch bolt gun.

PB

Thank you

[markm]

Not to hijack the thread but have you chronographed this load?

I don't think we ever chrono'd the BH 69gr TMK 556 load.