22-250AI Start Points

duckhunter175

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Have brass fireformed and have a pile of 75gr Amax, 80gr ELDM and a box of 90gr SMK.

Nosler book doesn't have data for heavies--

Have R15, R19, H4831sc, and other slow burn powders. What other powders should I check out?
 

Creedmoor shooter

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Oct 21, 2013
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Monroe, Newhampshire
Have brass fireformed and have a pile of 75gr Amax, 80gr ELDM and a box of 90gr SMK.

Nosler book doesn't have data for heavies--

Have R15, R19, H4831sc, and other slow burn powders. What other powders should I check out?
Give rl-26 a go. My dad is running I believe 42.5 or 43 I dont remember the exact charge and it pushes a 95 smk at 3200. We've had the 75 eld at 3550 as well with it
 

duckhunter175

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Are you guys starting with charges in the upper end of standard 22-250 or even up to 220 swift loads?
 

Slick8

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Aug 13, 2012
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The Republic of Texas
I used 220 swift loads but started low and worked up using ladder testing. Never actually found the max where the rifle starting telling me she was feeling it.

I found a load that I was happy with which met the speed I was looking for from the build.

I shot 69 SMK's during fire-forming then shot 75 AMAX's and 80 grain ELD-M's. The only bullet that has disappointed me was the 75 Swift Sirocco. Going to give it another try one day.

I shot this 25 shot group while fire-forming.

25 shot group.jpg
 

MagnumManiac

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Feb 25, 2008
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2,281
Haven’t investigated, but if you can find data for the bullet weight you want to use in the 22-250 data, then you can start at those max charges as your start loads.
I have always done this in mine without issue.
I have a preference for Varget and H4350 with heavies in mine.

I can’t run anything heavier than 60gr in my 1:14” twist.

Cheers.
:)
 

just country

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Aug 6, 2014
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morning, now I am running 39grs of 4320. 77gr. smk.
out of a rem. 722 hart SS 28" #7 contour barrel. HS
stock match timmey trigger. excellent. justme gbot tum
 

just country

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Aug 6, 2014
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78154
morning, use internet for obtaining different loads for
different length barrels and different twist. justme gbot tum
 

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