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.22 caliber 50 grain Z Max/ AR15 handloads
 Moderated by: Slingshot, Rockydog, klallen, DesertMarine, -6
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 Posted: Sun Dec 23rd, 2012 04:05 AM
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DarkShooter
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I just picked up 1,000 50gr Hornady Z Max (no cannelure) bullets and a set of RCBS AR series .223 dies (small base sizer and taper crimp)to replace my ancient Lee die set.

Im gonna be loading for a few black rifles with 20" 1/9 twist and 16" 1/7 twist barrels. I have W748 and H335 powder, most brands of small rifle primers in std and mag, and all brands of brass to work with.

Anyone load this bullet for AR's with these barrel twists? Im aware this is pretty much the same bullet as the V Max, but ive previously only loaded 55gr FMJBT, 60gr Hornady HP, and 69gr SMK. Lots of data in Hornady#8, but was wondering if anyone has any favorite loads with these two powders and this bullet for AR's.



 Posted: Sun Dec 23rd, 2012 08:30 AM
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RobertMT
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I would start at 24grs with either powder (with mag primers) and see if you get function in all ARs first. W748 runs a little cooler, than H335. H335 gives better accuracy.

I've run standard CCI 400s and WSR without slam fires, most often, mag primers are recommended, to prevent slam fires, without going to mil spec primers. I use wolf now and I have to drop back a grain with them.

On brass, I would sort it, by brand at least. If you have heavy mil brass, I start at one grain less powder and work up from there.



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 Posted: Mon Dec 24th, 2012 01:11 PM
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TMan51
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Interesting to see if they hold up to the spin rate on a 1:7 Twist barrel.  Be sure to post that.



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 Posted: Mon Dec 24th, 2012 01:37 PM
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SavageShooter
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TMan51,

They will...that's what I use in my varmint loads in my bolt action Savage with 1:7 twist. At least I can vouch for 300 yards. I won't shoot varmints past that with the .223, for that I get the .22-250 or .204



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 Posted: Mon Dec 24th, 2012 05:15 PM
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TMan51
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Thanks SS,

The other day I was calculating the spin rate for .223/1:12 @ 3100fps and a .22-250/1:14 @ 3500fps.  I was quite surprised that the .223 had a higher spin rate even though it was going 400fps slower.

I'm wondering where SX and Blitz bullets (and others) really start coming apart.  I've had SX's disappear in a .22-250 that were spinning slow by comparison to a .223/1:7 twist.

Just a curiosity thing.



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 Posted: Sun Jan 6th, 2013 01:32 AM
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DarkShooter
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Worked up loads with both H335 and W748, near max using the Hornady #8 manual. 5 shot groups at or slightly under 2 1/2" @ 100 yards from bench. With my eyes, im happy with that.



 Posted: Sun Jan 6th, 2013 02:04 AM
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TMan51 wrote:
Thanks SS,

The other day I was calculating the spin rate for .223/1:12 @ 3100fps and a .22-250/1:14 @ 3500fps.  I was quite surprised that the .223 had a higher spin rate even though it was going 400fps slower.

I'm wondering where SX and Blitz bullets (and others) really start coming apart.  I've had SX's disappear in a .22-250 that were spinning slow by comparison to a .223/1:7 twist.

Just a curiosity thing.


i've seen the dreaded grey trail ( and subsequent target splats altho there was also a 22 caliber hole ) from a .222 w/1-14"twist @3140-ish , leaving me to believe that sometimes it's also bullet design , these were soft points and i didnt see the same with v-max's or HP's but it was a bit too much for that particular bullet , dropping velocity down a couple hundred FPS ended it



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 Posted: Sun Jan 6th, 2013 04:41 PM
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TMan51
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SavageShooter wrote: TMan51,

They will...that's what I use in my varmint loads in my bolt action Savage with 1:7 twist. At least I can vouch for 300 yards. I won't shoot varmints past that with the .223, for that I get the .22-250 or .204

Interesting, how fast are they going?



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 Posted: Sun Jan 6th, 2013 05:30 PM
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fryboy wrote:
TMan51 wrote:
Thanks SS,

The other day I was calculating the spin rate for .223/1:12 @ 3100fps and a .22-250/1:14 @ 3500fps.  I was quite surprised that the .223 had a higher spin rate even though it was going 400fps slower.

I'm wondering where SX and Blitz bullets (and others) really start coming apart.  I've had SX's disappear in a .22-250 that were spinning slow by comparison to a .223/1:7 twist.

Just a curiosity thing.


i've seen the dreaded grey trail ( and subsequent target splats altho there was also a 22 caliber hole ) from a .222 w/1-14"twist @3140-ish , leaving me to believe that sometimes it's also bullet design , these were soft points and i didnt see the same with v-max's or HP's but it was a bit too much for that particular bullet , dropping velocity down a couple hundred FPS ended it



IMO, barrel condition has something to do with "the grey trail"..



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 Posted: Sun Jan 6th, 2013 05:40 PM
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it was a lil wore but not rough , the same load from my contender didnt produce the vapor trail so i kept that loading for it and reduced the charge to the same velocity in the rifle , that ended the trail , oddly enough ( and as previously stated ) other projectiles didnt do it ,only that brand of soft points , on the brite side the v-max's and h.p.'s were more accurate in it anyways

funny thing about the 50 grain v-max's , i shoot a bit of them in my .222 and 22-250 but not in .223's , my current trend in it is 40 grain v-max's ( soon to be z-max's but i digress )



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 Posted: Tue Jan 8th, 2013 09:48 AM
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Pete D.
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When I was developing loads for my AR some years ago, one combination was 25 grains of Accurate 2460 and a 52 grain Hornady AMax.
The barrel is 1-8".
That load gave me a one half inch group at 100 yards, the smallest group I have ever shot with iron sights.
Pete



 Posted: Tue Jan 8th, 2013 03:20 PM
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fryboy wrote:
TMan51 wrote:
Thanks SS,

The other day I was calculating the spin rate for .223/1:12 @ 3100fps and a .22-250/1:14 @ 3500fps.  I was quite surprised that the .223 had a higher spin rate even though it was going 400fps slower.

I'm wondering where SX and Blitz bullets (and others) really start coming apart.  I've had SX's disappear in a .22-250 that were spinning slow by comparison to a .223/1:7 twist.

Just a curiosity thing.


i've seen the dreaded grey trail ( and subsequent target splats altho there was also a 22 caliber hole ) from a .222 w/1-14"twist @3140-ish , leaving me to believe that sometimes it's also bullet design , these were soft points and i didnt see the same with v-max's or HP's but it was a bit too much for that particular bullet , dropping velocity down a couple hundred FPS ended it


I've not seen "The dreaded grey trail", but I have had perfectly accurate bullets in my SABOT loading just simply vanish if my load is upped in the slightest.

Also whacked one of my chronograph shade-support rods from 12 feet as well, gun was right thru center, some piece of bullet veered enough right and up to whack the rod HARD and bend it.:sofa:
1 in 12" twist I believe.
The 3980fps load is good to go.:thumbs:

ANY more powder (just a few tenths) and they simply vanish into thin air. :confused:



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