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Fireforming is no "effort", just find the most accurate load and go kill stuff.....that load will be considerably faster than a std 22-250. No it wont be, while fireforming you can make very accurate loads but they will be slower because of all the energy lost in blowing the brass out to fit the chamber, they are slower than a std 22-250 in every situation with reasonable pressure Yes it will be. Work up an AI fireform load starting at top end for the std. cartridge. Accuracy will be with more powder and it'll absolutely and for sure be faster. My best ever 22-250 load is a 50  3925. A 22-250AI fireform load will be 4000-4100 with 50's.
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Which is exactly the velocity you will get with a Swift shooting 50's. Curious isn't it?
In fact toasted a tube launching 52's @ 4050 - 4100 w/ AA 2700
Last edited by Swifty52; 04/17/14.
Swifty
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Which is exactly the velocity you will get with a Swift shooting 50's. Curious isn't it?
Curious, I don't know. Then get another 100fps with formed brass.
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If you look at the history of the caliber, the 22.250 just didn't have the juice capacity to get a 48 grain bullet out the tube @ 4100 fps safely or it would have been the Swift. Didn't cut the mustard. Ackley just rectified the short coming.
22.250 AI = 220 Swift.
Swifty
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If you look at the history of the caliber, the 22.250 just didn't have the juice capacity to get a 48 grain bullet out the tube @ 4100 fps safely or it would have been the Swift. Didn't cut the mustard. Ackley just rectified the short coming.
22.250 AI = 220 Swift. If YOU look at Dude270's original post, he was asking about the 22-250AI. Go argue somewhere else.
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Fireforming is no "effort", just find the most accurate load and go kill stuff.....that load will be considerably faster than a std 22-250. No it wont be, while fireforming you can make very accurate loads but they will be slower because of all the energy lost in blowing the brass out to fit the chamber, they are slower than a std 22-250 in every situation with reasonable pressure Yes it will be. Work up an AI fireform load starting at top end for the std. cartridge. Accuracy will be with more powder and it'll absolutely and for sure be faster. My best ever 22-250 load is a 50@3925. A 22-250AI fireform load will be 4000-4100 with 50's. I'm afraid that boatanchor is correct, ANY fireforming load will be slower than the std cartridge because more energy is used in blowing out the cartridge to fill the chamber. I use this method for 22-250AI, 257BobAI and 375Weatherby, not once has my chronograph shown an increase in velocity, in fact the exact opposite is true, a decrease of more than 100fps or more is normal. How do you get more powder into the original case for fireforming, just curious? Every book I've read suggests using a faster than normal powder for sharper pressure build up, this also reduces velocity. Cheers.
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Well Rigby......you and boatanchor really don't get it. This isn't difficult stuff to understand. Fireform loads are slower if you load them like a std. cartridge. But you don't, why would you? The case blows out quite a bit to fill an AI chamber. So you start at topend for the std case and go up to find best accuracy. In this cartridge my powder is RL15.......if you want to go by what a manual says, top end 50gr load for the std. 22-250 is at 36.0-36.5gr. The best ever 22-250 load for me is with 37.5gr and a 50 3925, 24" factory barrel/chamber. In an AI with 25" custom barrel/tight chamber, fireform load is 38.5gr of RL15 and a 50 going a bit over 4100. With formed brass add another 1 gr powder (depending on what the gun likes) and get about another 100fps. The 257 case blows out a lot to become an AI. I don't know what you're doing with yours, but fireform load in mine is with considerably more powder than what a manual says is top end for the std. 257. Velocity is considerably higher also, but this a heavy 28" barrel with tight neck chamber and definitely not a hunting rig. Point being that an AI fireform load uses more powder and is significantly faster than the standard cartridge. My other AI's, same thing. Fireform loads are well above what's top end for the standard cartridge.
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Well Rigby......you and boatanchor really don't get it. This isn't difficult stuff to understand. Fireform loads are slower if you load them like a std. cartridge. But you don't, why would you? The case blows out quite a bit to fill an AI chamber. So you start at topend for the std case and go up to find best accuracy. In this cartridge my powder is RL15.......if you want to go by what a manual says, top end 50gr load for the std. 22-250 is at 36.0-36.5gr. The best ever 22-250 load for me is with 37.5gr and a 50 3925, 24" factory barrel/chamber. In an AI with 25" custom barrel/tight chamber, fireform load is 38.5gr of RL15 and a 50 going a bit over 4100. With formed brass add another 1 gr powder (depending on what the gun likes) and get about another 100fps. The 257 case blows out a lot to become an AI. I don't know what you're doing with yours, but fireform load in mine is with considerably more powder than what a manual says is top end for the std. 257. Velocity is considerably higher also, but this a heavy 28" barrel with tight neck chamber and definitely not a hunting rig. Point being that an AI fireform load uses more powder and is significantly faster than the standard cartridge. My other AI's, same thing. Fireform loads are well above what's top end for the standard cartridge. You are saying me and 416 Rigby really dont get it......... I am saying you are a LIAR and full of Schitty52, it just does not work that way. I also live in Utah and own an Oehler 35p chronograph, if you can prove your claim of a fireform load with a 50 grain bullet going 4100 fps I will apologize to you on this forum. If you come up short you have to admit on this forum that you are a lying piece of Schitty52. PM me, lets make this happen btw: earlier I stated reasonable pressure (like 65,000psi) 100,000psi is not acceptable but would be hard to imagine in a fireform load
Last edited by boatanchor; 04/18/14.
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my ai forming,24" barrel,55g is 3850 fps with 5/8" groups or better, yet to find the down side of the ai after owning 8 regular 22/250's over the years
150-200+ fps, no fl sizing, no case trimming
what part of the above is hard to hard to understand?
Last edited by keith; 04/19/14.
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Yeah I'm saying neither of you get it. And calling me a liar........Larry Root you azzhole, seeing you would really p*ss me off.
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A 22x47 Lapua is another viable option. Just a simple resize and go. Already a 30� shoulder with no fire forming needed. And you will get swift+ performance from it.
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my ai forming,24" barrel,55g is 3850 fps with 5/8" groups or better, yet to find the down side of the ai after owning 8 regular 22/250's over the years
Keith and I built our first 22-250AI's around '89 or '90 after an article by Ross Seyfried. At that time a pretty standard fireform method was to fill the case with W760 to the mouth and seat a Sierra 55BTHP. Sounds crude but it worked fine and was surprisingly accurate. Even in a cut-back rechambered Rem chromoly barrel the velocity was about 3850 with a 55. I formed 900 cases that way. BTW-I'd used that same barrel as a std. 22-250.....most accurate load with the same W760 powder and Sierra 55BTHP was at 3550-3600.....not the fastest and certainly not high pressure, but the most accurate.
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If you look at the history of the caliber, the 22.250 just didn't have the juice capacity to get a 48 grain bullet out the tube @ 4100 fps safely or it would have been the Swift. Didn't cut the mustard. Ackley just rectified the short coming.
22.250 AI = 220 Swift. Swifty, In my Swifts, I shot the 50's at 4000 with a charge of 44.0-44.5g of 2700 out of 26" barrels. The really nasty part of shooting a swift is case growth, trimming, full length sizing. In the 22/250 AI, it seems to be a magic cartridge in how it takes the pressure without the need for full length sizing and case growth(forget case trimming). In a 26" barrel, I shot the 50's at 4150 into very tiny bug holes, same with the 55's at 4050 fps, 60 & 65g at 3650-3700 fps. There is no down side to the 22/250 AI, it is a HUGE improvement over a 220 Swift. If you love the Swift, then get an AI'd Swift!
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my ai forming,24" barrel,55g is 3850 fps with 5/8" groups or better, yet to find the down side of the ai after owning 8 regular 22/250's over the years
150-200+ fps, no fl sizing, no case trimming
what part of the above is hard to hard to understand?
I am not saying there is a downside to the 22-250AI (that would be Schitty52). I currently have 3 complete 22-250AI rifles my own reamer and dedicated fireforming barrel. The part that is hard to understand is your buddy claiming he can shoot fireform loads at 4100fps.
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Yeah I'm saying neither of you get it. And calling me a liar........Larry Root you azzhole, seeing you would really p*ss me off. Obviously the Larry Root thing is from the [bleep] up mind of Schitty52, you want to be p*ssed off thats fine. you want to prove 4100fps from fireform loads I can get access to the range in Hobble Creek canyon next Sunday....then we can determine who the azzhole really is. bring keith and his rifle too.
Last edited by boatanchor; 04/19/14.
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Yeah I'm saying neither of you get it. And calling me a liar........Larry Root you azzhole, seeing you would really p*ss me off. Obviously the Larry Root thing is from the [bleep] up mind of Schitty52, you want to be p*ssed off thats fine. you want to prove 4100fps from fireform loads I can get access to the range in Hobble Creek canyon next Sunday....then we can determine who the azzhole really is. bring keith and his rifle too. You're not getting it. I don't like you. You're an azzhole and it doesn't matter what you believe.
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You are just like a spoiled child, try and point out where they are wrong and then they throw a vitriolic tantrum, when you get above a 14 or 15 year old maturity level you might want to re-explore this topic.
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There's the azzhole....vitriolic prick calling it on someone else. Nothing to explore about this, you just don't know what you're talking about. Try doing something different and learn. Don't give me sh*t about what I do.
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Swifty
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Before you take off your Clown outfit please do another half-azzed powder comparison. 
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