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Joined: Aug 2008
Posts: 1,394
Campfire Regular
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Campfire Regular
Joined: Aug 2008
Posts: 1,394 |
1)I am ackman.
2)Barrel set back as the only solution. There is more than one way to skin a cat. Do it however you like........think skinning cats with a spoon is the way to go, have at it.
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Joined: Aug 2009
Posts: 1,603
Campfire Regular
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Campfire Regular
Joined: Aug 2009
Posts: 1,603 |
75gr A-max in a formed case with H335 and a 450 CCI.
3000 fps in the dead of summer.
62 TSX in a formed case with H335 and a 450 CCI, 3284fps .
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Joined: Feb 2010
Posts: 627
Campfire Regular
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Campfire Regular
Joined: Feb 2010
Posts: 627 |
Might wanna try imr 8208 xbr with the 75's. it works for me. Meters very well and low temp sensitivity. A very knowledgable friend told me that alliant 2000 mr is great for 75's and 80 amax
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Joined: Feb 2002
Posts: 7,197
Campfire Tracker
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Campfire Tracker
Joined: Feb 2002
Posts: 7,197 |
everyone needs at least half a dozen rifles in this caliber, long barrel life, ungodly accuracy, quick to find an accuracy node with most powders.
H335, AA2230, Benchmark, H322, N133, N135 all are surpurb.
H335 and AA2230 will give you very long barrel life, and that is no schitt!
If you will have Greg Tannel(Gre-Tan Rifles) bush your firing pin, you will not believe the good stuff that follows!
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Joined: Feb 2003
Posts: 10,361
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2003
Posts: 10,361 |
everyone needs at least half a dozen rifles in this caliber, long barrel life, ungodly accuracy, quick to find an accuracy node with most powders.
H335, AA2230, Benchmark, H322, N133, N135 all are surpurb.
H335 and AA2230 will give you very long barrel life, and that is no schitt!
If you will have Greg Tannel(Gre-Tan Rifles) bush your firing pin, you will not believe the good stuff that follows! While the .223 being SAAMI registered at 55 kpsi seems like overkill on safety margin to advanced handloaders, the .223 case head will fail before the primer will pierce even with factory firing pin fit. You may be thinking of 6mmBR case heads, the the primer will pierce in a work up, while the case head remains solid. ![[Linked Image]](http://i757.photobucket.com/albums/xx220/ClarkM/PrimersFallingOut223tiny.jpg) Work up with 33 gr Vmax in 223 with Blue dot in Ruger #1 ![[Linked Image]](http://i757.photobucket.com/albums/xx220/ClarkM/AR15BlueDot18Gr33VmaxDSCF0027.jpg) 33 gr Vmax in 223 with Blue Dot in AR15 ![[Linked Image]](http://i757.photobucket.com/albums/xx220/ClarkM/h335cases223small.jpg) 55 gr Vmax in 223 H335 in Ruger #1 unfired, extractor groove .329" 28 gr, extractor groove .329", 11% overload 69 kpsi Quickload 29 gr, extractor groove .329", 15% overload 80kpsi QL 30 gr, extractor groove .3295", 19% overload 92kpsi QL 31 gr, extractor groove .3320", 23% overload 106kpsi QL As you can see the case head starts failing at 30 gr and the primer has not pierced with 31 gr. The 6mmBR, OTOH, benefits greatly from Gre Tan bushing the firing pin. 6mmBR 65 gr Vmax 36 gr H335, primer will pierce, case head ok 6mmBR 75 gr Vmax 33.5 gr H335, primer will pierce, case head ok
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps
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Joined: Feb 2002
Posts: 7,197
Campfire Tracker
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Campfire Tracker
Joined: Feb 2002
Posts: 7,197 |
I have had a lot of 223 primer blank from over size firing pin holes in 223's.
Your firing pin hole, vs your firing pin has to be extremely tight for the pictures above, and I do thank you for posting...learned a lot.
What brand of primers were those?
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Joined: Feb 2003
Posts: 10,361
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2003
Posts: 10,361 |
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps
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Joined: Aug 2011
Posts: 3,893
Campfire Tracker
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Campfire Tracker
Joined: Aug 2011
Posts: 3,893 |
Old news and I've beat it up often. .378" pin to bolt fit is usually horrid. This one worse than that. 50gr V-Max 223AI form loads,at 3150-ish fps...which is very obviously...very SOFT. Positive headspace via both the shoulder and a smooch. ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/706/mzrl.jpg) The Cure. ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/600/ivi3.jpg) Same lot of ammo,pre bushing. Many would "think" high pressure,but these are underhand softballs. ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/163/d7l4.jpg) Same lot,post bushing. ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/197/cwb0.jpg) ![[Linked Image]](http://img.photobucket.com/albums/v136/BigStick/Stuff/Rifle%20Stuff/IMG_0023.jpg) 'Nother,for conversation. ![[Linked Image]](http://img.photobucket.com/albums/v136/BigStick/Stuff/Rifle%20Stuff/IMG_0014.jpg) Greg does all of mine and he touches upon it here. In fact,there should be another one freshly bushed,awaiting my arrival at the house. Bye-Bye CratersHint.
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Joined: Feb 2002
Posts: 7,197
Campfire Tracker
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Campfire Tracker
Joined: Feb 2002
Posts: 7,197 |
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Joined: Jun 2005
Posts: 2,196
Campfire Regular
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Campfire Regular
Joined: Jun 2005
Posts: 2,196 |
Cool bolt, trick moves pay off. . .
Too close for irons, switching to scope...
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Joined: Dec 2007
Posts: 25,088
Campfire Ranger
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Campfire Ranger
Joined: Dec 2007
Posts: 25,088 |
Is it just 700's throwin' a hot dog down a hallway, or is slop endemic to others .378's as well?
“Life is life and fun is fun, but it's all so quiet when the goldfish die.”
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Joined: Mar 2014
Posts: 3,344
Campfire Tracker
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Campfire Tracker
Joined: Mar 2014
Posts: 3,344 |
The .223 case head is good for long brass life at 75,000 psi.
The .223 is SAAMI registered at 55,000 psi.
That is at least 36% safety margin that can be exploited with handloads.
Contrast that with the 6mmRem or 270Win with case heads good for 67,000 psi with long brass life. They are SAAMI registered at 65,000 psi with 3% safety margin.
What does it all mean?
The loads in a load book for 223 or 223AI are only suggestions for bolt action rifles. The AR15s with non adjustable gas systems may be tuned up for 55kpsi. Is this iron clad truth?
Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven.
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Joined: Nov 2004
Posts: 9,988
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2004
Posts: 9,988 |
25g 8208xbr, cci41, 75 amax. Shoots great at 3000fpos from my 21" pacnor 3groove 8 twist. Meters great and no temp sensitivity.
Bb
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Joined: Nov 2004
Posts: 9,988
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2004
Posts: 9,988 |
25g 8208xbr, cci41, 75 amax. Shoots great at 3000fpos from my 21" pacnor 3groove 8 twist. Meters great and no temp sensitivity.
Bb
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Joined: Dec 2008
Posts: 296
Campfire Member
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Campfire Member
Joined: Dec 2008
Posts: 296 |
Good article on primers. CCI400 and others are too thin. Changing primers fixed my problem. Of course I found my problem back when you couldn't find primers. http://www.jamescalhoon.com/primers_and_pressure.php
gunmaker
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Custom Metalsmith & Stockmaker
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Joined: Jan 2008
Posts: 17,302
Campfire Ranger
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Campfire Ranger
Joined: Jan 2008
Posts: 17,302 |
27.6 gr of Leverevolution under a 75 ELD in formed Rem cases with a 400 is skookum.
Screw you! I'm voting for Trump again!
Ecc 10:2
The heart of the wise inclines to the right, but that of a fool to the 24HCF.
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Joined: Nov 2004
Posts: 9,988
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2004
Posts: 9,988 |
Rem 7.5 and cci 41 have harder cups and don't flow as much into loose firing pin holes. A cci 41 is basically a cci 450 with a harder cup rem 7.5s were made harder to deal with the flow of 17 rems. I run a lot of the cci 41s.
Bb
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Joined: Dec 2005
Posts: 2,932
Campfire Regular
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Campfire Regular
Joined: Dec 2005
Posts: 2,932 |
26.2 gr RL-15
CCI 400
LC Brass
75 gr Amax
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Joined: Feb 2003
Posts: 18,854
Campfire Ranger
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Campfire Ranger
Joined: Feb 2003
Posts: 18,854 |
Rem 7.5 and cci 41 have harder cups and don't flow as much into loose firing pin holes. A cci 41 is basically a cci 450 with a harder cup rem 7.5s were made harder to deal with the flow of 17 rems. I run a lot of the cci 41s.
Bb
I've got a bunch of 41's, and never thought of that. I will try them next time I load them up.
Sent from my Dingleberry Handheld Wireless
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Joined: Feb 2003
Posts: 18,854
Campfire Ranger
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Campfire Ranger
Joined: Feb 2003
Posts: 18,854 |
I will check my book tonight or at lunch. I'm using Big Game with 75 Gr. AMAX's and Lapua and Win brass. Seemed Quickload showed the highest velocity with the best efficiency, but it's been a few years ago that I worked it up.
Need to shoot some more 223 to fireform, because my son shoots them like they're 22LR's.
Sent from my Dingleberry Handheld Wireless
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