22-250 1:16 twist

[Ggmac]

Yes , rimfire . Blanks are sold and can be unknowingly improperly installed on a Centerfire , creating a dangerous situation . If the blank was sold second hand or buy some hack , check the bore size .
Most current aftermarket 22 rf blanks are 4140 cm but that's not the way it use to be .
Also when you checked the twist , you mentioned the length of the barrel and how many turns the rod made ? Did you take the length and divide the revs ? If so take into account the length of the chamber .
Sorry if this makes little sense , I'm going for my coffe now .
Gary

 

[AckleymanII]

You 'fried the barrel' ?

Yes, 3000 jackrabbits in two weeks

 

[dedogs]

Here, I neck size all the time

Neck sizing is not relevant at the moment. You want to make a chamber casting including some of the rifling using cerro-safe so you know exactly what you have for chamber dimension including the diameter of the lands and grooves. dedogs

 

[danyboy]

Yes , rimfire . Blanks are sold and can be unknowingly improperly installed on a Centerfire , creating a dangerous situation . If the blank was sold second hand or buy some hack , check the bore size .
Most current aftermarket 22 rf blanks are 4140 cm but that's not the way it use to be .
Also when you checked the twist , you mentioned the length of the barrel and how many turns the rod made ? Did you take the length and divide the revs ? If so take into account the length of the chamber .
Sorry if this makes little sense , I'm going for my coffe now .
Gary

A 22LR blank with 1.25" O.D. ? I've yet to see this. I have 24" of rifling, 26" total including the chamber. I measured the twist from the length of the rifling only, not including the chamber. I will check the bore size as soon as I have time.

 

[danyboy]

Neck sizing is not relevant at the moment. You want to make a chamber casting including some of the rifling using cerro-safe so you know exactly what you have for chamber dimension including the diameter of the lands and grooves. dedogs

Barrel slugs at .216" bore, .223" groove.

 

[Ggmac]

Got a half dozen 1.25"x26" sitting here . Had 12 need large shank blanks for , rem 40 Xb , Springfield 1922 , some Martinis , and a few more .

 

[danyboy]

Got a half dozen 1.25"x26" sitting here . Had 12 need large shank blanks for , rem 40 Xb , Springfield 1922 , some Martinis , and a few more .

Had no idea they made such big barrels for 22LR.

 

[Tommie]

A 1-16" twist 22-250 will stabilize 55 grain plastic tipped bullets?
Get serious, guys.

 

[danyboy]

A 1-16" twist 22-250 will stabilize 55 grain plastic tipped bullets?
Get serious, guys.

I tried 40gr. Nosler varmageddons today with 37gr of Imr4064. Accuracy was much worse than with 55 gr vmax and 35.5 gr. of IMR4895. So,maybe the 55gr.isn't so bad.

 

[cath8r]

Bet you the 50 gr speer tnt would work

 

[danyboy]

Bet you the 50 gr speer tnt would work

After months of fiddling around with this rifle, I decided to try it out with factory ammo. Tried Federal Premium 55 gr. Ballistic tip and surprisingly got better groups than with my reloads at 100 yards. Two 1/2", 5 shot groups at 100 yards. So, came back home and decided to pull apart one of them. OAL was 2.333", case length: 1.907", boat tail platic tipped bullet and 38.5 gr. of some ball powder that I have yet to find which one it is.
I remember casting bullets for a 45 Colt rifle and ballistic formula had pointed to a bullet in the neibourghood of 250 gr according to my twist rate.I had decided to challenge this result with a 346 gr. cast from another caliber and sized it to the proper diameter. It ended up being more accurate than this 250 gr.
So thanks everybody for all your advices ; time and practice will tell me which load data this bloody barrel likes.

 

[mikecr]

Don't abandon the search for truths.
You don't actually gain anything -if not for understanding.

So when a combination that isn't supposed to work, does,, why?
Why is a 55gr BT working in a 16tw?
Is there a truth somewhere that will change the conclusion?

 

[danyboy]

Don't abandon the search for truths.
You don't actually gain anything -if not for understanding.

So when a combination that isn't supposed to work, does,, why?
Why is a 55gr BT working in a 16tw?
Is there a truth somewhere that will change the conclusion?

Don't mean annoy anybody with this topic. Some guy from this club sent me this message which basically said to take my problem to castboolits.gunloads.com
Your 22-250 with a 16 twist barrel was most likely put
together by someone intending to shoot cast bullets. You
might go to the CastBoolits forum and inquire there,
I'm sure someone can help you with load data, even if
you want to shoot jacketed bullets.
Dan S.

Ya, guess you're wright; I won't give up the search. Federal ammo box says some 3,600 FPS with this 55 gr. ballistic tip. Which I could find this spheric powder (38.5gr.). I spent some time this afternoon trying to locate which powder it could be. Nosler lists Ramshot's Big Game as being the closest amount of powder used for this particular bullet but I have no idea what the powder looks like. I searched the net for what powder type this is but couldn't find if it was spheric, stick, etc...

 

[Zero333]

I have a feeling the powder might be Win-760 / H-414. 760 & 414 are the same identical powder under 2 different names.

Edit:

Just checked in Quickload, and 38.5gr of W-760 / H-414 under the 55gr Nos. BalTip, 2.330"coal in a 24" bbl estimates 3,586 fps & 52,642 psi.

 

[tcob68]

Being a 16tw makes me think it was originally meant for a 22CHeetah build. The CHeetah designers, Carmichal and Huntington, designed it to be very fast and very accurate, they chose the 16tw to shoot 50 and 52gr bullets at around 4300fps. An old coyote hunting buddy of mine used one and it was a laser for 400yds!

 

[rifleman700]

Hi everybody, new member here. I picked up this 22-250 and realized afterwards it had a 1:16 twist in a 1 1/2" O.D. barrel mounted on a Mauser 98K action. I tried Vmax 55gr. Nosler Varmageddon 40gr. and 35 gr. bullets. Have a hard time grouping with 55grainers and 40 gr ones aren't stable in the wind. Since 1:16 twist is more common with 22 Hornet, I can't really find any load data for such a twist in any of my loading books and neither on the net. Any help would be appreciated.
Thanks.

https://www.midwayusa.com/product/9...22-caliber-224-diameter-34-grain-hollow-point

 

[danyboy]

I have a feeling the powder might be Win-760 / H-414. 760 & 414 are the same identical powder under 2 different names.

Edit:

Just checked in Quickload, and 38.5gr of W-760 / H-414 under the 55gr Nos. BalTip, 2.330"coal in a 24" bbl estimates 3,586 fps & 52,642 psi.

I was checking out Hogdon's load data before reading this reply and they show 3582 FPS for 39gr. of H414. Pretty close to this Quickload.
http://www.hodgdonreloading.com/data/rifle

 

[danyboy]

https://www.midwayusa.com/product/9...22-caliber-224-diameter-34-grain-hollow-point

I was checking out Hogdon's load data before reading this reply and they show 3582 FPS for 39gr. of H414. Pretty close to this Quickload.
http://www.hodgdonreloading.com/data/rifle

I will get some H414 as soon as I can and give her a try.

 

[danyboy]

Yes , rimfire . Blanks are sold and can be unknowingly improperly installed on a Centerfire , creating a dangerous situation . If the blank was sold second hand or buy some hack , check the bore size .
Most current aftermarket 22 rf blanks are 4140 cm but that's not the way it use to be .
Also when you checked the twist , you mentioned the length of the barrel and how many turns the rod made ? Did you take the length and divide the revs ? If so take into account the length of the chamber .
Sorry if this makes little sense , I'm going for my coffe now .
Gary

Barrel slugs at .216" bore and .223" groove. Have yet to do chamber cast.

 

[danyboy]

Barrel slugs at .216" bore and .223" groove. Have yet to do chamber cast.

Shot 3 boxes of 55 gr. Nosler Ballistic tip spritzer bullets on top of 38.5 gr. of H414 and am quite satisfied with the results. The 35gr. 40gr. ones seem to be sensitive to the wind.