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Originally Posted by NIMROD
Yes
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Originally Posted by NIMROD
Yes
https://mdttac.com/blog/25-creedmoor...ly-inside-mdt/Quote:
Originally Posted by blip
thats an impressive exit!!!! the lab would think all her Christmases' had come at once.
Here she is compiling her "lab report".Quote:
Originally Posted by Micky Duck
Attachment 248471
Is a 257r based on a small action. Got a 7 08 sitting here doing nothing
Can be and mine is. The saami spec seems to be for a short action. Best in a medium or long action. Gives you room to seat the bullet out and more powder space.Quote:
Originally Posted by blip
The reloading dies working ok B ?
They were extremely hard to find
Me?Quote:
Originally Posted by 7mmsaum
Yes
Always good to see people using classic cartridges. Especially ones based on the great grandfather of all the 8x57 family and descendants.
I used a 8x57 on goats for yearsQuote:
Originally Posted by -BW-
Every time I fired it the rifle rang like a bell
Don’t even remember what it was but you couldn’t single load it
It had to be mag fed
They are good. I had some miss firing problems and found I was setting the shoulder too far back. My fault not the dies’.Quote:
Originally Posted by 7mmsaum
It was a control feed action, the extractor encompasses most of the rim and won't pop over it the case needs to ride up under the extractor. I have a 9.3 and 3006 like thatQuote:
Originally Posted by 7mmsaum
This tread got me thinking. Just had my worn out 243 Majestic rebarreled in 257 Ackley
:cool:Quote:
Originally Posted by tetawa
Thar is your 257 a factory chambering from kimber?Quote:
Originally Posted by Tahr
Nice, the push feed action a better option than the Mauser based Hunter/Viscount that I used. If I slow stroked the bolt, the round would hang up with the controlled feed.Quote:
Originally Posted by tetawa
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Yes it is. Not sure if they do them anymore. Bought mine about 3 years ago.Quote:
Originally Posted by Remmodel7
Anyone using 2209 or 2213sc ADI powders in 257 Ackley, ADI's load offering seem very limited other than max load.
Yes Tetawa, I have data from my rifle.Quote:
Originally Posted by tetawa
It has a 25 inch tube on a 98 action.
In .257 cal pills 87 and less are varmit construction.
So 100 and above is the go.
In Win +P brass
2209 - 51.5 gns - 100 gn Nosler BT - 3300 fps.
2213 SC - 50 gns - 120 gn Speer - 2900 fps.
Start lower and work up, the 100 gn load is warm.
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The 100 gn Hornady and Speers were about 100 fps slower. 40 degree ai chamber.
https://uploads.tapatalk-cdn.com/202...16892af2dd.jpg
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Have a few pkts of Nosler 100 BT and a pkt of 100 Partisan's, my last Ackley ran on the old Nosler 100gr Solid Base with H4831, the old reclaimed version.Quote:
Originally Posted by Dicko
loaded up using R-P new brass, numerous misfires with poor primer strike, no problem with Norma ex 7x57 cases, checking brass the R-P has a much wider extractor groove, remember many moons ago having or hearing about a similar problem with 257 brass but can't remember exactly.
An interesting scan through this thread, I've had a .257R as my go to for best part of 40years now, a Medium Action BSA Hunter with a worn out 7x57 tube, Din Collings rebarreled it into 257x57 with a slim 22" Douglas barrel. I asked him to throat it to allow for seating 120 grainers right out to mag max, ie 3", he erred on the generous side & I ended up with a bit more free bore than I'd reckoned on but the plus side was I found I could use 257 Improved data pretty much. I've recently bought some 110 gr Hornady ELD-Xs to have a play but in real terms, I've enough 120 Speers & Nosler SBs to see me out I reckon. I haven't shot anything but paper with it for years but prior to that it did all I asked of it.
in theory, because it headspaces off the shoulder..the size of extractor groove SHOULDNT come into play at all....be interesting to find out what is going on.Quote:
Originally Posted by tetawa
Did you seat well out to get bullet jam for fireforming? This really helps eliminate light strike issue.Quote:
Originally Posted by tetawa
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Yes, 117 RN way out to get jam. Barely marking the cases, with ex Norma 7x57 great strike. same primers. Have primed and fired both with m't brass, no problems with the ex 7x57. Will put up photo tomorrow showing the difference in extractor grooves.Quote:
Originally Posted by Mathias
I had a similar problem with my 260 improved and found if I gently closed the action on the round rather than normal speed, I had a higher success rate. Shutting too fast pushed the projectile into case & I got less headspace jam & a weak strikeQuote:
Originally Posted by tetawa
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I use a starting load with a 87 gn pill to fire form cases. They are quite accurate for game or paper.
After fire forming I reckon you should anneal them as they tend to get brittle necks a bit quicker than non ff cases in my mind.
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Have more brass from different manufacturers on the way, will report back after further trials.
Well, had a thought, neck sized up to 270, then resized to 257 creating a false shoulder, bingo all sorted.
Yes that's what I did with a 6.5x57AIQuote:
Originally Posted by tetawa
Greetings @tetawa,Quote:
Originally Posted by tetawa
The problem was likely that the R-P brass was shorter to the shoulder than Norma. The yanks, being what they are came up with a different chamber than the Mauser standard in the days before SAAMI. so SAAMI dimension cases will be short in the Mauser chamber, Having done this the US rifle manufacturers had to cut the chambers long enough to accept the continental round. This was well covered in a recent rifle or handloader and from my experience happened with the the 6.5x55 and likely others as well. Get yourself a headspace comparator tool from Hornady and do some measuring.
GPM.
Starting load, light pill, seated into the lands.
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Still getting 40% failure using 95 Berger and the RP brass, will find something lighter? No problems with WW and Norma brass, ex 6mmQuote:
Originally Posted by Dicko
Ignition failure still or not forming shoulder on first firing?Quote:
Originally Posted by tetawa
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Got a couple with the Kimber.257 the other night.
First one was 271 yards. The 115NBT passed through and broke both shoulders. Still made it 50 yards.
It was close to dark so vid quality not very good.
Attachment 252049
https://www.youtube.com/watch?v=grLO0p0xSlI
The second one was 315 yards (using IR). Shot a bit high and you can see the shots' bulge through the hinds back. It was off my knees so I 'suppose I can be excused. Never exited but wrecked off side shoulder. Dropped on spot.
Attachment 252050
This is the hind (above)
https://www.youtube.com/watch?v=TMMyI-PdJ1E
Does that unit compensate for range?
Yes. It has ballistics in it that work with the range finder. There is an aiming dot that moves according to the range. Very simple to set up and very effective.Quote:
Originally Posted by Shearer
