Indeed they are, maybe he meant a T3 I.e. ancient caliber in modern action ?Quote:
Originally Posted by veitnamcam
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Indeed they are, maybe he meant a T3 I.e. ancient caliber in modern action ?Quote:
Originally Posted by veitnamcam
One designed to handle modern pressures of around 60,000psi.Quote:
Originally Posted by ebf
SAAMI set a maximum average pressure of 46,000cup due to the number of older weaker actions around, hence factory ammo is weak and in a modern action hand loading can improve its performance substantially.
Yes something new not something from 1902Quote:
Originally Posted by camo wsm
Try this as an example
Vihtavuori have there usual loading data for 6.5x55 in the main section , then they have this
Products - Lapua
Please heed the warnings.
22lr and a 200 moa rail
Quote:
Originally Posted by ZG47
if you can't get a 140g burger VLD to a grand at 1400fps with a good working load it's time to give the game away :roll:
That rail wouldn't be cheap . Idd put a 200 moa bend upwards in the end of the barrel .Yup !Quote:
Originally Posted by ARdave
They call me the hiphopopotomus coz my rhymes are so endless...........................Quote:
Originally Posted by longrange308
Was this the CheyTac you were meaning? :D
https://www.youtube.com/watch?v=dvC4c-aY3bQ
Has anyone mentioned 300Win Mag?
Not if you AI it ;)Quote:
Originally Posted by ZG47
bloody shit phone
Just out of curiosity, what does AI'ing do other than increasing the powder capacity? Does it reduce pressure some how?Quote:
Originally Posted by Neckshot
First the minimum body taper. Less taper= less case stretch. Also a better gas seal and it grips the chamber walls tighter which meant less thrust transmitted on the locking mechanism. Also a straight walled case ejects easier than a tapered case
The steep shoulder slows down brass flow so that= longer brass life. Also confined burning gasses in the case longer and that helped powder consumption
Longer necks, projectile doesn't take up powder space, also doesn't look like hell :D
That's pretty much how I read it, I would copy and paste it but I can't. I can screen shot it though if you want or send you the pdf file @Gibo
I found the tapered case bit interesting, I would have thought the tapered case would extract easier
Creates a whole lot of heart ache sometimes:)Quote:
Originally Posted by Gibo
Been there got the Tee shirt:)
So longer brass life and easier extraction......must be more to it?Quote:
Originally Posted by Toby
Its alot of reading I didn't get far
More speed for same pressure.Quote:
Originally Posted by Gibo
Sent from my GT-S5360T using Tapatalk 2
Fire forming brass has been the only reason I haven't bothered having a crack at one over the years.Quote:
Originally Posted by Gibo
The tapered case part makes no sense....Quote:
Originally Posted by Toby
that's its only downfall.It cant be to long before you can buy 260AI cases if you can already get 280Ai.Quote:
Originally Posted by jakewire
I thought I'd write it out wrong, should have screen shot it like this insteadQuote:
Originally Posted by PerazziSC3
Attachment 28734
Neither dose the longer neck bit, maybe only a tad longer in a sweede case but not in a 260 case.But who cares AI cases look badassss!!!:cool:Quote:
Originally Posted by PerazziSC3
A 260 rem is a factory case is it not?.Quote:
Originally Posted by Toby
A case with to little taper is harder to eject than a tapered case especially when the brass gets old/fired a few times.
You just can't run them to their full potential because when you do they just won't eject especially if you have little or no primary extraction.
Most military cases have plenty of taper because that makes them more reliable in the field which is a very desirable trait if you are hunting something that can hurt you.
Fire forming is as easy as if you know what you are doing & only has to be done once for each case, just like neck turning, it just isn't as much of a PIA as most people make out.
A true AI chamber will accept a factory chambering happily if head spaced correctly.
Brass for an improved chamber needs to be fire formed carefully otherwise issues can arise which can lead to head separations, which combined with incorrect headspace & hot loads can result in a face full of nasty bits, particularly important to consider with improved chambering's without barrel designations & brass not formed in that particular chamber.
@BRADS i was thinking of AI'ing my 270 but there is nothing to improve
I knew a dude with a 270Ai.....tach driverQuote:
Originally Posted by Gibo
bloody shit phone
Your 270 is fine mate:)Quote:
Originally Posted by Gibo
It's far better than some highly strung wildcat with less than 100 round useful tube life:(
Theres a guy in hamils TGA with one.Quote:
Originally Posted by Neckshot
Much better than this current crop of limiter bashers :DQuote:
Originally Posted by Neckshot
Sent from my GT-S5360T using Tapatalk 2
Quite like Gregs 3006 AI :D could be a bit of meQuote:
Originally Posted by BRADS
Love my .223AI, so much so that I'm in the process of having a slightly larger AI built.
They are easy to load for and make a lot of sense to me.
As long as the smith sets up the chamber for a very slight crush fit on the shoulder of the parent case, then any problems of excess head space shouldn't be an issue.
Brass stretch and subsequent trimming is almost non existent, and 100-150fps depending on parent case is usually the norm.
Maximum parent case loads are usually a good starting load for AI chamberings and fire forming loads are normally very accurate.
What's not to like?
The Savage Model 99 is a rear locking action, hence the spring back with a hot load. So-called improved cases were initially developed in the U.S.A. in order to get extra velocity, through greater pressure, in relatively weak lever-action rifles, such as the notoriously weak Stevens 44 and 44-1/2 single-shot rifles using varmint cartridges; and various repeating types.
The U.S.A. and Britain engaged in a joint project after WWI to develop a lighter-recoiling cartridge which could be used in self-loading rifles, selective-fire rifles and machine guns. The British wanted a rimless cartridge that would feed and extract as reliably or better than the .303. The Yanks wanted to avoid the feeding and extraction issues that plagued the .30-06 more than any other modern rifle cartridge used in that conflict.
It wasn't just the Chauchat machine gun that failed with the .30-06. The machinegun that became the Vickers-Berthier and equipped the Indian army in WWII had problems with the .30-06 during the trials that culminated in adoption of the BAR. Increased taper and lower pressure were crucial parts of the equation. The long range target shooters in the U.S. Army sabotaged the process and the excuse given by MacArthur c. 1932? of existing ammo stocks was false, as those ammo stocks were all used up within the next several years, during a depression with cutbacks in training budgets!
The French adopted the 7.5x54MAS, an obviously tapered cartridge so close to the 6.5x55SE that Hornady used reformed 6.5x55 cases to develop their load data for it. When the yanks started work in 1941 to develop a new .30 calibre cartridge, they commenced their research with a thorough scientific examination of the aforementioned French cartridge. Subsequent adaption of the .300 Savage case probably resulted from a combination of cost saving imperatives (retention of existing rim size) and a desire to equal .30-06 ballistics (the 7.5x54 uses a 140gr projectile if I recall correctly).
How come u didnt go 22-250 bro?Quote:
Originally Posted by Matt2308
I had the .223 first and it didn't involve changing bolt face or anything else. Just re chamber and shoot.Quote:
Originally Posted by ARdave
At 3550 with 55 grain V-Max's and 3600 with 53 V-max using much less powder, I never felt the need for a .22-250.
yea wicked man :)
Hey all, just reading this thread and looking for something with longer legs, I see plenty of 308's and 7mm08's on Tme, how are they for distance on reds and also 30 06? Any advice greatly appreciated, have a 6.5 x55 swede mauser which is my main rifle, hoping to get enough gear together to reload my 303.25 (been sitting idle for 20 years!!) and also a LE no4 mk1 that needs a barrell (border line tomato stake material....).
Had a play with a 6.5 saum last week was awesome
Just what do you need to stretch out to 1000 for:wtfsmilie: you could always get a second mortgage and try a 338 Lapua Mag.
Back to the AI, my 260 Ai shoots just as well with fire-forming loads as it does with formed loads. 3050 with a 140 Berger (30 inch barrel)
