Home Forums Hunting & Shooting Custom Rifles & Wildcats 6mm-250ack load data needed.

looking for any load data and speeds u getting with 105gr bullets. Thanks.

I've not done it but I bet you'd be pretty close with 6mm Creedmore data.

John

Try 6mm XC as your starting point. The 6mm/22-250AI is only .001" longer in the body otherwise identical.

Hodgdon has 6-250 data on their site; I'd start in the middle of the top for parent cartridge for fire forming, then jump to top of parent numbers for load testing w/ formed cases.

I'm getting 3100 fps from a 95 gr VLD in a straight 6-250 using Ramshot Hunter so that may be a good option?

Good luck,

Efw

Ps- PM me your email if you'd like me to forward load data I got from the ballistician @ Ramshot for 6-250

Look at the "6mm International" load data

I'd think 6mm Remington data would be pretty close

Buy a Berger manual. It has 6XC data, which is essentially what you have.

I can use Roberts data for a 250AI so I'd think using 6mm data for a 6/250AI wouldn't be a leap.

I think there are a couple differences between the comparisons that create an issue:

1) there is no 308-based 25 cal, so Bob is nearest whereas we have the 243 in 6mm which is more similar to 6-250 AI capacity-wise

2) SAAMI max pressure for Bob was set low in deference to its chambering in weaker actions while 6mm Rem was designed from the get-go for modern rifles, exaggerating difference

Just a couple of guesses as to why it isn't an apples-to-apples comparison.

Silly me, I just based it on volume.

I shot the 70's at 3800 fps out of a 28"12" twist barrel with zero freebore, case crammed full of 760 using a long drop tube. You won't get anywhere near that out of a fast twist with a long throat, but may give you some idea.

Use tough brass, Lapua, Win.

I forgive you.

Thats moving. I did have a 6-250 standard non ack and ran 70s at 3650fps with a 23 in hart 1-12 twist.I want 3250fps with a 105gr bullet.

Im thinkin you are going to need a bigger engine to drive a 105 at 3250fps

Yeah I am maxed out in my standard 6-250 @ 3120 fps w/ 95 VLDs.

According to Hodgdon site a 243 Win may get you to 3k w/ 105. A 6mm Rem may get 3100 w/ same.

I hate like hell to agree w/him but Steelhead is right. I can guarantee you your ending load will be almost exactly the same as a 6mmRemington load. Especially the closer you get to max. 250AI=257Roberts, 257AI=25-06, 7X57AI=280Remington, 30-06AI=300H&H. powdr