75 grain amax 22-250

sbe2 · Dec 28, 2016

I have an 8 twist 223 that shoots the 75 grain amax quite well but just for kicks I am looking at a Browning X-Bolt 22-250 with the 9 twist. My question is with the higher velocity of a 22-250 could a guy get by shooting a 75 grain amax out of a 9 twist 22-250? Any real world experience? I know that i could buy one and try it but i would rather not lay out the coin and find out it doesnt work.

Thanks

Kurtr · Dec 28, 2016

If i remember right i think enslow has been shooting those i think he would have the answer for you

Enslow · Dec 28, 2016

I have a 1:8 twist so i dont know if the 1:9 would work.

SDMF · Dec 28, 2016

Enslow said:
I have a 1:8 twist so i dont know if the 1:9 would work.

Me too.

FWIW, when Hornady switched their packaging to advertise their AMP jackets they also changed the twist suggestion from 1:9 to 1:8.

For sure you'd be able to shoot the 75gn BTHP from Hornady. I can shoot those from my 1:9 16" AR.

sbe2 · Dec 28, 2016

SDMF do you think the amp jacket changed the needed twist rate or was it changed just to be on the safe side? I was looking through one of those one book one caliber manuals for a 22-250 and all it says in there in the hornady section under the 75 grain amax data is that the amax won't stabilize in a 10 twist and slower barrels so I don't know what to think.

SDMF · Dec 28, 2016

I really don't know. If I were you I'd call Hornady and Berger tomorrow.

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Something else to consider is how much room is in the X-bolt magazine? Is it a full 2.8" or is the magazine blocked @ the back? If so, what length? Figure the lands with a std. 22-250 and 75's is ~2.660-2.670". You could potentially end up with a magazine that's so short that you're required to seat the 75's deeper than the ogive which is a deal-breaker IMO.

sbe2 · Dec 29, 2016

I looked into it a little bit and in a pinch a guy could use the 243/308 magazine which would give plenty of room if needed.

jdinny · Dec 29, 2016

Berger has a stability factor calculator that you could input the BC and data in to see if it would stabilize. remember the optimal stability factor is 1.5 but to shoot accurate you don't necessary need a 1.5 stability rating. anything 1.5 and higher is excellent anything below 1.5 you will start to lose %'s of BC but accuracy will not be affected until your stability drops below 1.2. Temperature, altitude are all playing into tis factor.
for ex there is guys hunting at elevation ( 6000ft) shooting 195gr bergers from a 1:9" twist 7mm but the package says 1:8 is needed.

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head over to sniper forums, or long range hunting forums you will get the die hard LR guys to weigh in

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any load development I do I start there is as there is always someone doing what your looking for

SDMF · Dec 29, 2016

sbe2 said:
I looked into it a little bit and in a pinch a guy could use the 243/308 magazine which would give plenty of room if needed.

Does the bolt stop in a 22-250 X-bolt allow you to cycle the bolt back to cycle 2.8" cases? As long as it does then you're golden with the 243/308 mags. If it doesn't, it's probably not too hard to swap out.

sbe2 · Dec 29, 2016

i didnt check into that but i figured if needed i could make due changing out the bolt stop or modify the existing one if needed. I talked to Hornady today and they said that the 75 amax may work out of a 9 twist if you step on it but that if it didn't the new 73 grain eld would work real well.

SDMF · Dec 29, 2016

sbe2 said:
I talked to Hornady today and they said that the 75 amax may work out of a 9 twist if you step on it but that if it didn't the new 73 grain eld would work real well.

Figure you can run 3250-3300fps with a standard 22-250 and 75's. Guessing the 73's probably have the ogive moved forward enough to cycle in an AR magazine given a BC just under .4 though I haven't looked into it and haven't had my hands on them yet. The new 75 ELD's have an even better BC than the old A-Max, .467 vs. .435, haven't fiddled with them yet either as I've a fairly large stash of 75 A-max.

PrairieGhost · Dec 29, 2016

I can't tell you about the 22-250, but I shoot 140 Berger VLD'S in a 6.5 Creedmoor 1/8 twist at 2700 fps and in a 6.5x284 1/9 twist at 2975fps. Velocity does help stabilize.

sbe2 · Dec 29, 2016

Yeah I'm sitting on a large stash of the older 75 grain amax as well that if nothing else if they don't work in the 22-250 I'm thinking about I can keep using them in the 223. The 73 eld has a .398 bc which is still pretty good. I was told they were designed to shoot in an ar magazine so their is a lot of flexibility in seating depth.

On a side note the guy I talked to from Hornady today was very friendly and extremely helpful and willing to answer any question I had.

jdinny · Dec 30, 2016

go to bergers website. find the stability factor calculator. you will input all the data, grains, length, BC, temp, altitude, velocity, etc etc it will tell you if you have enough to stabilize. it doesn't matter if its a beger bullet./

enter you high end guess, enter your low end guess. this will at least tell you if you have a chance at stabilizing this bullet.

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SDMF · Dec 30, 2016

Enslow · Dec 30, 2016

The 75s at 3400 whistle through the air. What a cool sound! They are all almost too much fun haha. Out to 600 kentucky windage is all that is needed.

huffranger · Jan 24, 2017

I tried to get 1-9 barrel with a 22-250AI chamber to shoot 75 A-max's

This was my results

SBE2 I hope you had better luck than me.

deleted_account · Jan 24, 2017

huffranger said:
I tried to get 1-9 barrel with a 22-250AI chamber to shoot 75 A-max's

This was my results

SBE2 I hope you had better luck than me.

gnarly!

huffranger · Jan 24, 2017

No kidding... hate to get hit in the belly button with one of those suckers

75 grain amax 22-250

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