What data are you using, the 50 gn gmx? Wanting to try one of my favorite powders with them.Quote:
Originally Posted by BuckSPC
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What data are you using, the 50 gn gmx? Wanting to try one of my favorite powders with them.Quote:
Originally Posted by BuckSPC
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I am back from the range and wanted to share my results.
AR-15 16" 1:7 twist
Sage's Processed LC brass
CCI400 primers
24gr. AR Comp powder
2.230 OAL
Target is at 100 yards.https://uploads.tapatalk-cdn.com/201...f04dcbd0b0.jpghttps://uploads.tapatalk-cdn.com/201...4267284c70.jpg
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Nice!! Are you shooting from a sled?Quote:
Originally Posted by Bill and Kim
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Yes, I used a Caldwell sled for the tests. I like to keep me out of the equation when getting a load developed.
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Good to know. Now I don't feel so bad about my groupings shooting prone!Quote:
Originally Posted by Bill and Kim
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Now I don't have any excuses if I miss! LOLQuote:
Originally Posted by CodySPowell
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True enough! [emoji16]Quote:
Originally Posted by Bill and Kim
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Is anybody using cfe 223
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Love it!!
So many people blame other things ( Brass, bullet, etc) and never take the human element out of it.
One day I hope ALL reloaders figure this out before bashing a load, bullet, gun, etc'
I didn't realize most everyone was using sleds for their test shots... here I am laying in the dirt shooting prone. Now I don't feel so bad about my results. I bet in a sled I'd be putting bullets through the same hole! [emoji16]Quote:
Originally Posted by Wes Sage
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Agree buddy! I know the gun and load will always be better than my shooting so if I think it’s great it probably is really awesome.Quote:
Originally Posted by Wes Sage
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Now I have to buy a sled just to see how good they are... [emoji6]Quote:
Originally Posted by Clopez
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Thanks Wes,Quote:
Originally Posted by Wes Sage
I want to know it's me and not my reloads. If I miss the mark I know it's me that needs development. Now I want to figure out how to lower my ES. I am my toughest critic and always welcome constructive criticism and always look for ways to improve.
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I never could get comfortable with a sled. I bought a nice portable shooting bench and a some sand bags. Something about it.
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I have a bunch but haven't tried it yet.Quote:
Originally Posted by Shane P
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My Lee manual shows 27-28.5 gr for a 50 gr jacketed bullet loaded at 2.210". Not sure how a generic jacketed bullet compares in length to a Zmax though.
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Nosler's website shows 27-29 gr loaded at 2.260"https://uploads.tapatalk-cdn.com/201...9257586cbb.jpgQuote:
Originally Posted by Shane P
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Honestly it would be best to work up some loads. If you start with a charge and play around with it, increasing it slowly at a set OAL until you see good groupings. It seems the zmax aren't real picky on OAL, more so on the charge. 2.200 to 2.240 seems to be the average.Quote:
Originally Posted by Shane P
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I got some loaded and just shot them to check for pressure signs. So far so good, gonna put it to paper and see. Thanks cody.Quote:
Originally Posted by CodySPowell
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Of course! Let us know how it goes.Quote:
Originally Posted by Shane P
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They were all shooting well and then I put 4 of five in the same hole. I think I pulled that one. Max charge from the book with no pleasure signs. Took it past max, in .2 increments, and it got worse. So I've got my load. Man I'm happy right now. https://uploads.tapatalk-cdn.com/201...40e3745021.jpghttps://uploads.tapatalk-cdn.com/201...449e1dc289.jpg
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Very nice! Thanks for sharing! [emoji106]Quote:
Originally Posted by Shane P
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It gets better tried the blc-2. Another good shooter. https://uploads.tapatalk-cdn.com/201...2c7da921e7.jpgQuote:
Originally Posted by CodySPowell
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Awesome buddy!!
Thanks for the write up
Thanks for posting the pics and info. [emoji106][emoji2532]
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Here's my results from today.
https://m.facebook.com/groups/132952...03113943127943https://uploads.tapatalk-cdn.com/201...3d385a1d16.jpghttps://uploads.tapatalk-cdn.com/201...0673648c5f.jpg
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Are you still shooting prone Cody?Quote:
Originally Posted by CodySPowell
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Yes, I'm going to build a portable bench soon hopefully and get a sled for load testing.Quote:
Originally Posted by Bill and Kim
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How was the trigger, those groups I posted the other day were with that saber trigger I was telling you about. It was a hundred bucks, how much was that one? And what weight powder got your best groupQuote:
Originally Posted by CodySPowell
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Trigger was awesome! Paid $110 for it on sale. I didn't do any ladder testing today. Already have my charges figured out for the Zmax. Today was mostly about getting time with the new trigger and seeing if it would help tighten up my groups.Quote:
Originally Posted by Shane P
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Working on some 50gr Zmax
LC brass
CCI# 41 primers
H335https://uploads.tapatalk-cdn.com/201...ba85af12b4.jpg
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https://previews.dropbox.com/p/thumb...00&size_mode=3
Recently acquired a Remington very pretty M788 in .22-250; 24" 1:14 twist bbl, plain wood stock. I mounted a Weaver 3-15x50mm Tactical
scope on QD rings and a steel Picatinny base. I had to float the barrel 20 thou to get below 2.5" groups. :( Someone had skim bedded the action in fiberglass. :)
Confident in my bullet (50Zs rule!) I ran through several powders giving me 1.5" and narrowed those down to TAC and IMR4166.
TAC gave me 1.2" grps @ 3560'/s. Not sizzling MV and for coyotes I could have lived with the accuracy but....
I re-focused on IMR4166...
On this target I worked up a 4166 load using 0.2gr incremental increases until I got my first sign of pressure...very slight bolt stick on opening. (Pink dot target: 1.1" group overall @ 100yds)
I backed off 0.2gr and fired 5 at the orange dot: All 5 hits are under the dime. LabRadar says 3740'/s, +/- 15. These were the 4th loads through this Hdy brass and the primer pockets are still tight.
(Hdy 3x brass, neck sized and LEE Factory Crimped, 2.355" c.o.a.l., 0.55" group, 3740'/s MV. I'm calling this my std load. It is not compressed.)
My Shooter phone app says I'm an inch high @ 100 for a 300yd zero and only 4" low @ 400yds. Fairly flat.
I've made up 50 rds of this standard load to haul around with me looking for places to prove the trajectory in the field under low wind conditions.
Meanwhile I reviewed the relationship between barrel twist and MV as affects accuracy. My std .223 prairie dog (PD) load is quite accurate from 5 different rifles with 8 and 9 twist barrels at MV ~3200'/s. One site suggests MVx720/twist = bullet RPM. For my PD load that's 3200x720/9 = 256,000RPM. The TAC .22-250 load above looks like this: 3650x720/14 ~ 187,700RPM, considerably lower.
My new std IMR4166 .22-250 load looks like this: 3740x720/14 ~ 192,300RPM. Considering nothing else, this would suggest that 187k RPM is not sufficient to stabilize our 50Z but 192k RPM is.
Given that my .223 PD loads are roughly twice as accurate at 256k RPM I'm almost willing to wish for a 12 twist .22-250 barrel. (3740x720/12 ~ 224,400RPM)
My next project will be to work up loads for my Savage 24" .22-250 bench rifle with 1:12 twist to see if I can duplicate the MV with this bullet - and see if the increased MV results in better accuracy than previous loads from that rifle at lower MV.
Then I'll be looking for .22-250 loads with 68gr bullets.
One final note, our wonderful 50Z bullet does NOT fly apart in mid-air under centrifugal force even at 256k RPM. I wonder whether, with increased heat and friction ripping at its almost 'frangible' jacket, it might come apart at 3740'/s from a 10 twist or, even faster, barrel?
Anybody got field or bench data from such a combination?
Wow! Great information, thanks for sharing this! [emoji106]Quote:
Originally Posted by sagela
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You're welcome. Now I have to learn to operate a Dropbox!!!
Dropbox is awesome, drag and drop just like moving from folder to folder.
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OK, I figured it out and edited the post. Pic is vertical and I reworded some of the findings slightly - hope it's clearer now.
Best group so far testing Benchmark.
Savage 110 223 Varmint. 26" 1:9
I'm going to push the load up just a tad more and see if it tightens up. https://uploads.tapatalk-cdn.com/201...650435b653.jpg
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Very nice!Quote:
Originally Posted by Sgt Greybeard
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Yes very nice indeed. [emoji853]
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"My next project will be to work up loads for my Savage 24" .22-250 bench rifle with 1:12 twist to see if I can duplicate the MV with this bullet - and see if the increased MV results in better accuracy than previous loads from that rifle at lower MV."
Since the IMR4166 powder worked well in the Rem788 .22-250 I used the same powder to work up loads in my Savage 12 hvy bbl (24" 1:12) .22-250.
Neck sized cases from the Rem788 won't chamber in the Savage, indicating its chamber is tighter and with its faster twist it hit 3820'/s with 0.2gr less powder.
3820z720/12=229,200 RPM, a bit higher than I needed to test the theory that RPM correlates with accuracy. (In working up the 4166 charges
all 10 rds went into 1.5".)
I have 20 rds and two sighters/bore foulers made up for an accuracy test with the 3820'/s load. Results later today, I hope.
Attachment 760
Results: 4ea 5 shot groups under 1moa, averaging 3835'/s with our favorite Z-Max bullet. Ready for prairie dogs.
I'll reload these cases and shoot some more groups without the chrono running, take my time and see if I can shrink the groups a bit
but basically, I'm done.