22-250 1 in 9 twist

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moeben

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Looking for load data, I have h414 and h380 on hand. I want to try A Max 75 grain.
I checked hogdon online data and nothing, My book dosen't have anything for fast twist.
The rifle is a savage 12vlp with 1 in 9 twist and a 26 inch barrel.
 
Nice seeing you at the range this past weekend, Moe. Looking forward to shooting with you in PEI.

Ditto on Obtunded's advice.

Hodgdon's web site has data for 70 grain SPR SP, indicating a max of 35.0 H380 (3161 fps) and a max of 34.0 H414 (3117 fps). With 75 grain bullets, you'll likely max out half a grain or a grain less than that, and your velocity with 75s will be 3000fps more or less.

Get your 75s shooting as accurately as you can at 100 yards.

Then, go here - JBM trajectory calculations

... and enter in your relevant data:
Bullet: Hornady .224 cal 75 gr A-Max
Muzzle velocity: 3000fps
Zero range: 100

You'll then see that when sighted in at 100 yards, you'll have to come up 3.6 minutes elevation to shoot 300 yards. To shoot 500 yards, you'll need to come up 9.1 minutes from your 100 yard zero. And to shoot 600 yards, you'll need to come up 12.4 minutes from your 100 yard zero.

A very useful thing to do, once you have everything sighted in and shooting well at 100 yards, is to raise your scope's elevation 15 minutes and fire a group at 100 yards (make sure you have at least 20 inches of paper above your aiming point). You should see a nice tight group that is 15" higher than your point of aim, and it should be directly above your point of aim. (The point of this test is to verify that your scope has enough elevation adjustment to shoot 600 yards. If it doesn't, the time to find out is now so that you can fix it, rather than your first time firing on a 600 yard range).
 
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mbra-shooter: Big thanks. I'm doing the same kind of load with my .22-250 sporting a 9" twist barrel. I'm shooting the 75 gr Amax up to 800m this summer in Connaught. I'm using W735 and the Hornady engineer/techie dude reminded me to keep it between 3100 fps and 3200 fps muzzle velocity. I'll start out at 30 grains and then work my way up using the Chrony. :D

Thanks for the good advice.

:evil:

Barney
 
Hungry/Barney, glad you found it helpful.

WC735 is a fairly quick powder to be using for a .22-250 firing 75 grain bullets; if you wanted/needed max velocity you'd want to find a powder that would max out pressure with more or less a full case of powder (slower than Varget, more in the 4350-neighbourhood). But, there's nothing at all wrong with using 735, and you'll most likely be able to get a good accurate load with it. The most it will "cost" you will be 50-100fps of maximum attainable velocity, and a .22-250/75 is a powerful enough combination that you needn't fret about getting every last bit of potential out of it - firing a 75 A-max at 3000fps, you get as good wind drift performance at 1000 yards / 900m as a Palma rifle. So 800m should really be a piece of cake.

Higginson says WC735 is 5% faster than H335. Hodgdon's data for .22-250 for 55 grain bullets indicates that H335 is about a grain quicker than IMR 3031, and it also indicates a max load of 31.5 IMR-3031 for 70 grain bullets. I'd also SWAG that max for a 75 grain bullet might be half a grain lower than for a 70 grain. "Adding" all these factors up, I "estimate" a max load for 75 A-Maxs and WC735 to be:

31.5 (grains of IMR-3031 for .22-250/70 grain)
minus 1 grain (H335 vs. IMR3031)
minus 1.5 grain (WC735 is 5% quicker than H335)
minus 0.5 grain (75 vs. 70 grain bullets)
=======
28.5 grains WC735 (my SWAG of max load for .22-250 for 75 grain bullets)

So you might want to start even lower than 30 grains of WC735, and work your way up until you exceed 3000fps and get good accuracy and good velocity consistency.
 
moeben said:
Looking for load data, I have h414 and h380 on hand. I want to try A Max 75 grain.
I checked hogdon online data and nothing, My book dosen't have anything for fast twist.
The rifle is a savage 12vlp with 1 in 9 twist and a 26 inch barrel.
Click to expand...

I have pretty much the same rifle. a 12fv. If you look in the back of the savage manual that comes with ur gun you will see Savage all ready recommends 40gn nosler's. They are a great round. im using the ones with the orange tips and enjoying them.
 
Moeben
I would be trying some RL 15 or VT 540 with your gun, fellow at range had a new gun made up with 26" heavy barrel 1/8 ywist shooting 75 & 80gr bullets using ball powders with very modest success. I have suggest Varget,rl 15 & Vt 540 they are the go to powders for the 223 I shoot 75gr Bergrs with 223 at 3000fps 1/4min at 100 & 300excellent load for 1000y
Here is a group my buddy shot last Sat with 80gr sierras this is at 300 yards

P1060495.jpg

P1060492.jpg

and my brother shot a .600" group with 80gr sierra.s & VT 540
good luck manitou
 
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Thanks guys for the info very helpful

Hi Daniel
I was mistaken on the date for the shoot in PEI, I do not get back from Ontario until the 26th. I see on the schedule that the next shoot is at Bull Meadows on the 31st to the 2nd. I will be there are you planing on going?
 
(Moe is talking about the RNBRA Fullbore schedule here)

I haven't made a firm go/no-go decision yet for the NS APM 31-July->2-Aug yet, but there's a good chance I'll have to forego it. It's a great match though, if I was rich and single I'd definitely be going ;-)

If shooting a three-day Annual Prize Meet seems a bit overwhelming for your first highpower match, you could also shoot the Sun-2-August "Precision run-through" at Batouche range (CFB Gagetown). If you do decide you want to try the NS APM, we can find a "mentor" for you (there'll be a steep learning curve..!)
 
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