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I just measured the COAL of 10 rounds of factory 90 SMK ammo. Average of 2.247" high:2.252" low 2.242". That seems way short considering ASC and PRI mags can be loaded to 2.310" reliably and modified PRI mags to 2.330".
I'm guessing we will see higher velocities once we start handloading.
I also have a 22" +2 gas on order.
I am going the Valkyrie route, I am looking at getting a JP and the APO Bolt action and using it this year
I think there is a lot of merit to it
Was there any indication that it'll work flawlessly in an AICS mag?
Sounded like he said magpul is going to make 224 polymer mags in aics pattern.
I have to ask what is up with so many people wanting to do Valkyrie in a bolt gun? I personally don't see the appeal but that's why I'm asking.
This is a VERY, very good question. When the -250 case is just sitting there, among many, many others, unless a guy is one of the extremely limited examples with an SPC-size bolt face in a bolt action...
Any standard BF bolt action that could run the Valkyrie (with significant work to the boltface), could just press the easy button and use a .22-250. At a SAAMI rating of 65,000, it is an extremely strong casing, and in 7 to 7.5-twist, I'd bet the -250 could be made to run the Sierra 90 or 95 grainers at 3,000+.
-Nate
What twist rate?FWIW, my 22-250AI with 80 grain A-Max and H4831sc will easily reach 3200 before I start seeing pressure. A better quality barrel would likely best that by a bit and I have yet to try H1000 powder. I might have to try so 90 and 95's in it this year.
I'm going with 22" but it will be on an AR.So 20" or 22" barrels?
I wonder if the brass you saw, was coming out of a gun with a fluted chamber (I have no idea why they would do that, but just tossing it out there). Fluted chambers can surely mangle some brass....Sadly as cold as it was that day I don't recall what they brought.
Nope They were def Valkyrie.
Dont know if I have ever seen this done but the damage to the brass was all around the case head. Every time. Like the extractors were chewing the shit out of em.I wonder if the brass you saw, was coming out of a gun with a fluted chamber (I have no idea why they would do that, but just tossing it out there). Fluted chambers can surely mangle some brass....
I don't know if you saw my response on the first page of this thread, but I thought it would be a good lightweight walking varminter that can reach to 1k. I'm not talking on a R700 action, I'm talking on a lightweight action like the Savage 25. Picture a 4 lb. rifle with a minimal scope. Too bad Sako doesn't make the Vixen action anymore.I have to ask what is up with so many people wanting to do Valkyrie in a bolt gun? I personally don't see the appeal but that's why I'm asking.
I don't know if you saw my response on the first page of this thread, but I thought it would be a good lightweight walking varminter that can reach to 1k. I'm not talking on a R700 action, I'm talking on a lightweight action like the Savage 25. Picture a 4 lb. rifle with a minimal scope. Too bad Sako doesn't make the Vixen action anymore.
WOW! I guess if you talk fast enough, you don't have to say everything that is or is not true:
.224" 90 gr. bullets don't "cut the wind" better than 6.5's. At least not high BC dedicated 6.5's. From what I see he's only getting 30 more FPS than what I get out of my 6.5 Grendel.
I have to ask too, have I been calculating ES and SD wrong all this time? Seems to me he fired five shots and got a 70 FPS difference. Yet he comes up with a 20 sumpin' SD. Do you stick a target number in the middle of your shots and call the SD how far your shots go off that?
Lastly, if your going to do an accuracy test, set the fucking thing up for accuracy. The way he set it up, we don't know if he fucked up, the rifle was 'hot' (he blamed his piss poor groups on that) or is the ammunition not up to par? Nothing pisses me off worse than some dipshit claiming super or sub-par accuracy and don't even bag the rear of the rifle from a solid rest.
I don't know if you saw my response on the first page of this thread, but I thought it would be a good lightweight walking varminter that can reach to 1k. I'm not talking on a R700 action, I'm talking on a lightweight action like the Savage 25. Picture a 4 lb. rifle with a minimal scope. Too bad Sako doesn't make the Vixen action anymore.
WOW! I guess if you talk fast enough, you don't have to say everything that is or is not true:
.224" 90 gr. bullets don't "cut the wind" better than 6.5's. At least not high BC dedicated 6.5's. From what I see he's only getting 30 more FPS than what I get out of my 6.5 Grendel.
I have to ask too, have I been calculating ES and SD wrong all this time? Seems to me he fired five shots and got a 70 FPS difference. Yet he comes up with a 20 sumpin' SD. Do you stick a target number in the middle of your shots and call the SD how far your shots go off that?
Lastly, if your going to do an accuracy test, set the fucking thing up for accuracy. The way he set it up, we don't know if he fucked up, the rifle was 'hot' (he blamed his piss poor groups on that) or is the ammunition not up to par? Nothing pisses me off worse than some dipshit claiming super or sub-par accuracy and don't even bag the rear of the rifle from a solid rest. And if his rifle gets hot and shoots like that in five shots, it's not worth buying.
Dont know if I have ever seen this done but the damage to the brass was all around the case head. Every time. Like the extractors were chewing the shit out of em.
You're absolutely correct that higher BC > a little more velocity, but what bullet are you stuffing in a 6.5 Grendel at mag length that has a higher BC than the .563 BC of the 90gr SMK? I can't imagine that you're using any of the 140 class bullets successfully in a Grendel.
IMO the only round that can be compete and be successfully chambered in a AR15 that's somewhat common (although not commercial) is the 6mm AR/LBC/Grendel, whatever you wish to call it. With the 105's it does compete nicely but I still see the SPC based Valkyrie advantageous in the AR15 platform for what most of us do. Mainly for the magazines because I've seen the long curve of the high capacity Grendel mags hinder a shooters ability more than once on a barricade and the lower capacity straighter mags often aren't enough without mag changes which eat up time. The SPC mags are much straighter, essentially the same as a 30rd 556 mag in profile which has been a non issue for me.
As to SD, it's calculated off the string of shots and 20fps SD is right in line with a 70fps ES so I'd say yes, there's a good chance you've been calculating something wrong. Any good chrono should do this for you though so calculating it to begin with is your first mistake.
You're absolutely correct that higher BC > a little more velocity, but what bullet are you stuffing in a 6.5 Grendel at mag length that has a higher BC than the .563 BC of the 90gr SMK? I can't imagine that you're using any of the 140 class bullets successfully in a Grendel.
IMO the only round that can be compete and be successfully chambered in a AR15 that's somewhat common (although not commercial) is the 6mm AR/LBC/Grendel, whatever you wish to call it. With the 105's it does compete nicely but I still see the SPC based Valkyrie advantageous in the AR15 platform for what most of us do. Mainly for the magazines because I've seen the long curve of the high capacity Grendel mags hinder a shooters ability more than once on a barricade and the lower capacity straighter mags often aren't enough without mag changes which eat up time. The SPC mags are much straighter, essentially the same as a 30rd 556 mag in profile which has been a non issue for me.
As to SD, it's calculated off the string of shots and 20fps SD is right in line with a 70fps ES so I'd say yes, there's a good chance you've been calculating something wrong. Any good chrono should do this for you though so calculating it to begin with is your first mistake.
@sandwarrior The 90 grain sierra matchking is now pointed. That's something new that sierra seems to be doing on a lot of their matchkings now. IIRC, they collect this data by shooting the bullet at different velocities in their 300 yard underground tunnel and that is why we have the different velocity bands. So it should be pretty close.
123 Lapua's, Sierra SMK and Hornady I run them at about 2750 using 28.5 gr. IMR 8208XBR. I also load the 130 gr. Norma Golden/Diamond target with 28 gr. of 8208. Although I prefer the golden's as they don't pollute the barrel. Did Sierra change their 90 gr. bullet? from a few years ago. I notice their BC is higher than the ones I used to shoot. How do they base the number? Form? actual data ranges? Doppler?
According to the numbers, the Valkryie has the 6.5G beat in both velocity and BC. That has not been my experience in the field (BC only). Although, I will readily concede the Valkryie is superior to the 5.56. And, of course, it fits in the -15 platform where a larger case does not. (.22-250, .22 Cr).
As to ES and SD, I went back and watched the vid and only the one group was 77 fps and it was one round. No, 77 FPS does not normally fall right in line with 20 SD. At least not to us handloaders. But, I'll note this is factory ammunition and that is still pretty good. It was only one round that dropped. FWIW, it's never a mistake to check the calculations of your computer. Only an idiot would not check what was going on. And no, I've never measured SD by throwing out the ES. I measure as the average velocity difference. His other loads seemed to be on average about 30 fps apart. In the first group it did not throw a wild shot (2718 fps).
That would be pretty slow for a 24" barrel. 2500 ish is 16" barrel territory.123 Lapua's, Sierra SMK and Hornady I run them at about 2750 using 28.5 gr. IMR 8208XBR. That'd be the fastest I've ever heard of.
Do you mean 2570 fps???