22-250 8 twist groups

[GWY]

josebd;

The load I used was worked up 10-12 years ago and was safe IN MY RIFLE. As always, start low and work your way up as every rifle is unique.

That being said, I was using prepped Winchester brass (Winchester was pretty good quality back then), Federal 210M primers, around 35 grains of H4350 and Sierra 80 grain Matchkings jumping around .025"

Good luck.

GWY

 

[josebd]

I just set this up for abpicture,yes front rest is backwards and not straight

 

[C.E.Smith043]

I just set this up for abpicture,yes front rest is backwards and not straight
View attachment 1074420

If you're going for the most accuracy, shed the wooden bench and go cement. The wood will move. Especially with you sitting on it.

 

[Evan]

If you're going for the most accuracy, shed the wooden bench and go cement. The wood will move. Especially with you sitting on it.

I don't think the gun is shooting tight enough yet for that to change his groups. Only hosebd can say if his technique is good and it's the gun. If he doesn't feel the bench move, it's probably not a huge factor. I've never been limited by my wood benches.
complete with brass catcher, umbrella sunshade, and attention hungry house cat.

 

[josebd]

The bench is real solid,it doesn't move

 

[thatguyshm]

Are you set on the 77gr? It would seem the 75gr ELD would drift less. I plan on using either that or the 80gr in my 22-250 AI.

If you are set on your 77s,then look at your .005 group and fiddle with the powder charges. I don't think .1gr would do it with the case capacity, if it were me I'd do .2gr either side and see what would work best.

Thinking out loud, I would probably test some once fired brass and see if it's even worth trying or if you are going to need to re-develope with the extra case capacity.

SHM

 

[josebd]

Going to load up some hornady 75 eld-m with h4350,would it be better to test groups at 300 yards for these,or will 200 yards be ok?

 

[Evlshnngns]

I would keep going at 200, keep it all consistent.

 

[4xforfun]

Have you tried to jam the bullets at all? That is what i would try.

 

[josebd]

The 75's? No,I haven't even shot them yet,I'm starting at .010 off lands.

 

[Hondo64d]

Going to load up some hornady 75 eld-m with h4350,would it be better to test groups at 300 yards for these,or will 200 yards be ok?

I tried H4350 behind 75gr Amaxes in my 22-250 but had hands down better results from R15. This group is 5 shots at 710 yards,

John

 

[josebd]

Load data?

 

[Hondo64d]

Load data?

33.3gr R15 behind 75gr Amax, Lapua Brass, Tula LRM primer. Warm load so work up carefully.

John

 

[alinwa]

josebd,

I'ma' give you some opinions. These are the opinions of someone who daily, on call in front of witnesses DOES make little bugholes @100 and has been exactly where you are.

My opinions will be wildly different than ever'body else's..... in fact I only read a few of the others and I moved on to give my opinion.

I've shot TONS of groups like that.

I've worn out barrels with groups like that.

IMO your setup is doing exactly what it's designed to do.

Also, IMO your groups are all the same ie you don't have "any direction to go"..... anything that "shows promise"

If you want your gun to shoot better than that you need to change the gun. You're shooting fine, it's THE GUN that's lacking. And the chambering.

Those are in fact very good groups for a 22-250 chambering. I'm guessing it's a fat-necked chamber and I'm guessing you're using off-the-shelf dies. because I can't imagine anything but that for a 22-250

IME your next step is a 22X47L or even a 22CM custom neck-turn reamer with a fitted FL die because spending that much time, money and effort on a 22-250 will just make you weep in the end and either of those chamberings WILL DO what you want......or heck, even the little 22BR will SMOKE the 22-250.

I repeat, you're shooting fine.

opinionby





al

 

[josebd]

Ok alinwa we will see!

 

[mike mccormick]

If the 22-250 is so inadequate, why are so many rounds ( like the creedmores) based on it?

 

[alinwa]

If the 22-250 is so inadequate, why are so many rounds ( like the creedmores) based on it?

A Merlin race block is based on a cast iron BBC, that doesn't imply that you'll ever compete successfully using a 1972 454 block from grampa's old station wagon....

To actually answer your question, perty much every successful wildcat is based on something already available. The 22-250 falls short in a variety of areas, the biggest being that the angles used preclude good resizing. The low shoulder will always slip and makes precise chamber fit problematic......The excess body taper also makes extraction difficult and the large primer makes it impossible to get the pressure up for a clean burn......ALL problems identified and SOLVED in the CM round.

 

[22DASHER]

I assume he is talking about SOLVED with the “Competition Match” round!!!! Just an FYI.

 

[josebd]

Who knows?

 

[mike mccormick]

A Merlin race block is based on a cast iron BBC, that doesn't imply that you'll ever compete successfully using a 1972 454 block from grampa's old station wagon....

To actually answer your question, perty much every successful wildcat is based on something already available. The 22-250 falls short in a variety of areas, the biggest being that the angles used preclude good resizing. The low shoulder will always slip and makes precise chamber fit problematic......The excess body taper also makes extraction difficult and the large primer makes it impossible to get the pressure up for a clean burn......ALL problems identified and SOLVED in the CM round.