224 valkyrie

[NikatKimber]

Drop and windage I was under the impression it beats .308.

.308 175gr SMK @ 2750fps muzzle @10mph crosswind
Dist............drop............vel.....energy......drift
yds..............in..............ft/s......ft*lbs........in
1000 ... -347.7829 ... 1294 ... 651 ..... 91.3527

.224V 90gr SMK @ 2700fps muzzle @10mph crosswind
Dist............drop............vel.....energy......drift
yds..............in..............ft/s......ft*lbs........in
1000 ... -336.1557 ... 1376 ... 378 ..... 80.5959


http://gundata.org/ballistic-calculator/

 

[RugersGR8]

22 PLINKSTER


MAC

 

[dennishoddy]

Yeah, its the darling of the gun media right now.
2700 fps with a 95 grain bullet that flies real well. Incredibly well actually, but there are other short action calibers out there that outrun it.

 

[Rhino 55]

Ok I'm building a 224 Valkyrie now on a Mega Arms platform. I'm using a Krieger 1-6.5 twist barrel. 24 inches long. I have the chamber reamer and head space gages too. I'm looikg hard at it because i'm looking at getting back into NRA high power matches and shooting PRS matches too.

 

[swampratt]

That bullet drop calculation does not allow for the bullets dropping Ballistic Coefecient numbers the slower they go.
The 175 SMK was needing to be calculated at .496 BC as that is what Sierra claims at 1800-2800 FPS. .505 BC above 2800
then .485 BC below 1800 fps.
The 90 SMK starts off at .563 BC at 2080 fps and above then below that it is .550 BC and then below 1640 fps it is .480 BC

May not stack up like you think once you start shooting it.
The .308 with 155 Palma # 2158 can be launched at 2900fps easily I have done it with staying in the Load data in a 24" savage factory tube.
The drops and wind drift look very well for it. But proof is in shooting it.
That bullet likes velocity and I found you need to really speed it up to make it group tight.
I could not find an accuracy node down low.

Maybe that 224 valkyrie will not be picky when it comes to making accurate ammo for long range shooting.
I would be curious as to the real drop in inches at 1000 yards.

I have not had any bullets yet that followed the calculator at all distances.

 

[Jcann]

That bullet drop calculation does not allow for the bullets dropping Ballistic Coefecient numbers the slower they go.
The 175 SMK was needing to be calculated at .496 BC as that is what Sierra claims at 1800-2800 FPS. .505 BC above 2800
then .485 BC below 1800 fps.
The 90 SMK starts off at .563 BC at 2080 fps and above then below that it is .550 BC and then below 1640 fps it is .480 BC

May not stack up like you think once you start shooting it.
The .308 with 155 Palma # 2158 can be launched at 2900fps easily I have done it with staying in the Load data in a 24" savage factory tube.
The drops and wind drift look very well for it. But proof is in shooting it.
That bullet likes velocity and I found you need to really speed it up to make it group tight.
I could not find an accuracy node down low.

Maybe that 224 valkyrie will not be picky when it comes to making accurate ammo for long range shooting.
I would be curious as to the real drop in inches at 1000 yards.

I have not had any bullets yet that followed the calculator at all distances.

I believe the ballistics apps factor in the BC throughout the flight profile (velocity) based on the bullet profile from the apps library or input by the user. I could be mistaken thou.

Its still best to gather your ballistic profile through field testing.​

 

[swampratt]

If it lets you input the bullet used probably but if it only lets you input the BC then i feel it would be off.
But i agree field testing is king.

 

[Jcann]

I know Bryan Litz with Applied Ballistics has built and modeled a substantial bullet drag model library for his program and mobile apps.
appliedballisticsllc.com/ballistics-educational-resources/custom-drag-curves/

My Shooter app is very close to my field gathered data...close enough that I could use it for hunting or steel without even field testing.

 

[Neanderthal]

I'm seriously considering going this route with a current AR build. Has any new info came out that would nudge me one way or the other?