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Getting Itchy to plan a load 7x57AI

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d4570 View Drop Down
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    Posted: 26 May 2023 at 13:24
I have been looking in loads for the GD's soon to be built 7mm Mauser AI.
The info is difficult to find for the AI in a modern action.
I think we will start with a 140 gr bullet than later a much smaller one for P dogs/coyotes.
Maybe a sst or a ttsx if we can ever find any.
We have most any kind of powder. At some point later I can envision something in like a 175 ish something, but she will have to grow in to that. From what We have been finding RL-26 can increase FPS with little increase in recoil. But we will start with something in a midrange velocity, it's a 24" barrel.
Has anyone seen info or have some insight?Ermm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MapleHill Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2023 at 19:54
I would say 4350-4831 range would work great, RL19, RL22, 4350, Hybrid 100V, Superformance, 4831. Somewhere in that burn speed me guesses. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote klallen Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2023 at 23:37
Looking forward to the progress here. When I started loading for my .280AI, I chose a power that offered optimum performance in the standard .280 and used the max load for the starting load in my AI. R22 was my powder and the 140 gr accubond was always going to be the bullet used. If someone were to gift me the rifle your building, the 140 accubond is where I'd start and looking at the data, maybe a max standard load of R19 or IMR4350 for starters. Watching with interest ...... k
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d4570 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 09:02
CryAs soon as "SHAW" ships us the barrel, it has been 11 weeks and no sign of a barrel.
There sight says 8 to 12 weeks for fulfillment. The boy ordered his 358 Norma a week later then me and just got it last week. We will rent the go/no go gauges $25 bucks for 4 days, we will do both so I have to wait till we have both in hand. We have the wrenches and nuts. The boy has made up 100 cases for his project, and I have 120 factory 7x57 shells to brake in the barrel and fire form the cases. We will use a Redfield 4X12 and a Quaker claw sling for the 57.Ouch
PS I just found some Barnes ttxs 140 gr bullets I may just buy them, I love Barnes.


Edited by d4570 - 27 May 2023 at 09:03
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEAR Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 09:28
I'm in NY, but at home I have some pretty hot 7x57 loads for my Ruger#1 in 7x57.

will get info when I get back.

You might actually want to start at the minimum suggested 7x57 load till she gets the hang of it.
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d4570 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 10:06
Yes, we will not start out +p the 57 is way plenty of rifle for anything she will shoot.
We  got the AI to stop most of the case stretch, not necessarily for "more" speed. BUT we have that option. I got a 1x8 twist to handle longer bullets if and when we need it.
I just found some ttsx Barnes 140 gr, I ordered them today. We have sst 139's that we will try also.
The D-I-L uses 140 eld in here 280 AI with great success. D-I-L uses the AI advantage with big gulps of powder, Remember she has and uses a 338/378 WB too.Big smile


Edited by d4570 - 27 May 2023 at 10:07
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEAR Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 10:37
Annie will like the 139 SST, great for antelope and deer.

Accurate and killers.

As you know I don't like the copper bullets, but many do, especially if you live in California.
The IQ and the life expectancy of the average American recently passed each other in opposite directions.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MapleHill Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 14:36
7X57AI sounds like a winner! I have a standard 7X57, I haven't shot it much, its a pretty mdl 70 Fthrwgt and don't plan to take it out much. If I had a mind to get another custom rifle, I would have to think hard about a 7AI.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2023 at 14:57
"As you know I don't like the copper bullets, but many do,"
Add me to that list.
I have seen them do some darn amazing things.
In my 6 an 80 gr ttsx will destroy a mule deer shoulder go through and smash the off side shoulder.Clap



























At 450 yards.Big smile

You can imagen my 8 and a 200 gr.


Edited by d4570 - 27 May 2023 at 14:58
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 27 June 2023 at 20:28
Well Dang!
After 15 weeks the project gets a nudge forward.
The barrel arrived on my porch, unannounced.
OUT STANDING, of course the boy just left for a fire out of state, 3 weeks. I'll buzz by his shop and get the stock and see if it fits. It may be a different taper. We will rent a go-No gage when the boy get back. I'm hoping to have this project finished by Hunting season, I also want her to have some good trigger time before she hunts with it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEAR Quote  Post ReplyReply Direct Link To This Post Posted: 06 July 2023 at 11:21
Movin forward.

forgot, whose brand barrel did you decide???
The IQ and the life expectancy of the average American recently passed each other in opposite directions.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 18 July 2023 at 16:26
We rented the headspace gauges, you get a 3 day window to use them. We had to get the timing window to land on the 3 days my boy get off after his 21 day Fire assignment. Just made it today is his last day off and we got the gauges last evening. SO today we where gun smiths...
We had all the tools ahead of time, barrel vice blocks, action block and nut wrenches. The Savage was easy we ordered it and we have a torque wrench 40 foot pounds needed. The Ruger not so easy. We ordered one but it would not fit, so I hit several tool shops till I found a spanner wrench that would work, but no way to use the torque wrench. It operates like a pipe wrench with a "Tooth" not jaws, but it is short and we had to use a cheater on it. We guessed at the foot pounds, just got it really tight. I'll put a drop fingernail palish on to to watch it. If it moves we will see the brake in the palish. We have 150 shells to fire form if it hold that I think we are good to go.
We shot 5 today, when braking in the barrel Shaw says to shoot one clean then shoot again cooling between for 5, then two and clean till you shoot 20 the clean well and your finished. The factory Hornady 139s listed at 2680 fps have light recoil in my mind. We have some Nosler 140s that claim 2700 I have yet to shoot. I have on hand a 100 Barnes tsx I want to try when we work up loads, I'm a BIG fan of Barnes. I also have a bunch of sst's I think there 140s too there a great bullet too.
We will load to a similar speed to keep the recoil down. As she get bigger we can go up.
Pic of a formed brass to a not formed.

The boy is doing a 358 Norma from a savage 270.
That one you head space off the belt something but different. That one uses a 308 Norma case which is a 375 H&H a bit shorter and blowen out some.
He is starting with a 250 gr bullet but thinks a 225 will be the bullet for his purpose. BOY that's a monster caliber too, Like a Whelen but more.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Irish Bird Dog Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2023 at 20:47
Well,Shades of P.O. Ackley.....D sounds like you boys got yer hands full but heading in right direction.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2023 at 20:56
So far with fire forming loads Both shoot out standing!!!!Thumbs Up
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