Can't get much speed with .22 Creed 88 eld's

[Cuando]

Just put together a .22 Creedmoor 1-7" @ 21" bbl. I have the 75 eld's going 3,475 with RL 26. I figured I'd play with the 88's and 26, but velocity kinda hit a wall at 3,150 and then hit pressure. Shot some great groups, but I was a bit surprised they weren't running 3,200 ish at least.

Switched to RL 16 and hit the same wall at 3,150 and pressured out.

Thoughts?

 

[linebaugh]

For your bbl length I would say that might be spot on.

 

[Txhillbilly]

My 20" barrel doesn't like any loads with RL 26. You might try a different powder.
I'm getting 3400 fps with H4350 with 75 gr A-max's,but that's what I mainly shoot out of mine.

 

[284winner]

Just put together a .22 Creedmoor 1-7" @ 21" bbl. I have the 75 eld's going 3,475 with RL 26. I figured I'd play with the 88's and 26, but velocity kinda hit a wall at 3,150 and then hit pressure. Shot some great groups, but I was a bit surprised they weren't running 3,200 ish at least.

Switched to RL 16 and hit the same wall at 3,150 and pressured out.

Thoughts?

That's about right for a 21" barrel. You could add about 150+ fps for another 5" of barrel. The 88s at 3300 would be about right for a standard 22 Creedmoor. Could try maybe the RE 23 and see if you pick up any speed. I'd say max for that cartridge would be 3400.

 

[xswanted]

My 20" barrel doesn't like any loads with RL 26. You might try a different powder.
I'm getting 3400 fps with H4350 with 75 gr A-max's,but that's what I mainly shoot out of mine.

If you don’t mind me asking how much are you using?

I have a 20” 22-250 AI on the way and was hoping for 3300 with H4350 or 17.

 

[linebaugh]

If you don’t mind me asking how much are you using?

I have a 20” 22-250 AI on the way and was hoping for 3300 with H4350 or 17.

3300 with the 75s or with the 88s? I can tell you for certain you will not get there with 88s. I dont think you can get to 3300 with 88's in a 30" tube without some pressure problems but you could get close. The 22250AI is about 1-2gr short of the 22 creed in capacity, sorry I dont remember the exact number, so it will be a bit slower.

 

[xswanted]

3300 with the 75s or with the 88s? I can tell you for certain you will not get there with 88s. I dont think you can get to 3300 with 88's in a 30" tube without some pressure problems but you could get close. The 22250AI is about 1-2gr short of the 22 creed in capacity, sorry I dont remember the exact number, so it will be a bit slower.

The question was in reference your post regarding 75s

Thank you!

 

[284winner]

3300 with the 75s or with the 88s? I can tell you for certain you will not get there with 88s. I dont think you can get to 3300 with 88's in a 30" tube without some pressure problems but you could get close. The 22250AI is about 1-2gr short of the 22 creed in capacity, sorry I dont remember the exact number, so it will be a bit slower.

30" 22-250 AI and getting 3550 easily with zero pressure with 80 elds. 30" is alot different than 20".

 

[Cuando]

I've seen where Copper Creek has the 88's going 3,350 in a 24" bbl so I figured 3,200 ish shouldn't be that difficult.

I do think it interesting that the 75's will haul so much ass with a slow powder like 26 and the 88's would not.

 

[Txhillbilly]

If you don’t mind me asking how much are you using?

I have a 20” 22-250 AI on the way and was hoping for 3300 with H4350 or 17.

43.2 gr of H4350 using necked down 6mm CM Starline brass and cci 450 primers.

 

[Frankm]

Ditto on guessing barrel length. We re getting easy 3250 with 88 s in both 22 Creed and 22-250 AI ... but, both have 26" barrels.

 

[Ranger188]

What kind of primers are you using?
30 fps per inch might be part of the problem with a slow powder.
Try something in-between like RL23
What was this build going to be used for?
Otherwise, shoot the 75's and be happy