Wow! I can't even imagine!
Good for you! Impressed!
Good for you! Impressed!
I have had a .257 AI and now a 6mm AI - 40* shoulder.
My gunsmith likes to cut the chamber slightly short so I get a crush fit the junction of neck & shoulder when fireforming - tight fit, essentially no headspace when fireforming. For subsequent loads I use a shortened shell holder to maintain correct head space.
I use whatever pistol primers I have available and whatever pistol powder I have, When fireforming, I start at 10% of the total capacity load then work up so I get nice sharp shoulders.. Coffee grounds (dry) sound good for a filler vs. cream of whatever. Like, if 60 grains of pistol powder fills the case to the top of the neck, I start with 6 grains, the last FF session used 9 grains of HP38.
Dies are available for popular AI calibers. My 6mm Lee collet neck sizer works with 6mm AI brass. I have a Redding 6mm AI F/L sizer die (stock item) and I use a generic 6mm Hornady seating die. Necks are turned to .268 diameter. My brass is adequately fireformed at chamber pressures of about 60K PSI - this is after COW fireforming using full charge loads with bullets. I would not select any AI cartridge that required custom dies - $$ - just me.
With the 6mm AI the case capacity is increased about 10% resulting in 80-100 FPS increase, case stretching is almost nothing, feeding is excellent in my Ruger M77 MKII LA rifle. COAL is right around 3 inches depending on what bullet I use. I planned on getting a 8 twist 6mm AI on a FN commercial Mauser but gave up on the idea when the intended rifle would not feed dummy 6mm AI rounds because the shoulder hung up on the top collar inside the receiver ring - that rifle was re-barreled to 6mm-06.
I use my 10 twist 6mm AI with 87 grain VMax bullets & H4350, RL16,or IMR4831 against rodents - real good performance - 600 yards and beyond. Many 3 shot clover leaf groups and under 2 inches at 300 - good enough for me.
The generic Hornady seater die is used for; .243W, 6mm Rem, 6mm AI & 6mm-06. Brass diameter at the shoulder is of no consequence.
Just remembered - under 10* & snowing - time for a Dickel & fireplace (gas).
I have had a .257 AI and now a 6mm AI - 40* shoulder.
My gunsmith likes to cut the chamber slightly short so I get a crush fit the junction of neck & shoulder when fireforming - tight fit, essentially no headspace when fireforming. For subsequent loads I use a shortened shell holder to maintain correct head space.
I use whatever pistol primers I have available and whatever pistol powder I have, When fireforming, I start at 10% of the total capacity load then work up so I get nice sharp shoulders.. Coffee grounds (dry) sound good for a filler vs. cream of whatever. Like, if 60 grains of pistol powder fills the case to the top of the neck, I start with 6 grains, the last FF session used 9 grains of HP38.
Dies are available for popular AI calibers. My 6mm Lee collet neck sizer works with 6mm AI brass. I have a Redding 6mm AI F/L sizer die (stock item) and I use a generic 6mm Hornady seating die. Necks are turned to .268 diameter. My brass is adequately fireformed at chamber pressures of about 60K PSI - this is after COW fireforming using full charge loads with bullets. I would not select any AI cartridge that required custom dies - $$ - just me.
With the 6mm AI the case capacity is increased about 10% resulting in 80-100 FPS increase, case stretching is almost nothing, feeding is excellent in my Ruger M77 MKII LA rifle. COAL is right around 3 inches depending on what bullet I use. I planned on getting a 8 twist 6mm AI on a FN commercial Mauser but gave up on the idea when the intended rifle would not feed dummy 6mm AI rounds because the shoulder hung up on the top collar inside the receiver ring - that rifle was re-barreled to 6mm-06.
I use my 10 twist 6mm AI with 87 grain VMax bullets & H4350, RL16,or IMR4831 against rodents - real good performance - 600 yards and beyond. Many 3 shot clover leaf groups and under 2 inches at 300 - good enough for me.
The generic Hornady seater die is used for; .243W, 6mm Rem, 6mm AI & 6mm-06. Brass diameter at the shoulder is of no consequence.
Just remembered - under 10* & snowing - time for a Dickel & fireplace (gas).
Redding makes a standard die ser fo my 25.06ai. I also have a body die, (thanks Bro Bean), and now have Lee collet die, and FCD. When weather straightens up, gonna put it all to good use, along with some awesome Lapua brass.I looked at the Hornaday site and did not find a 'generic' seating die. I'm just edging in to AI and would appreciate your clarification on exactly which die you are using.
Guess I don't run my AI cases too hard. I've got 3 boxes on their 7th to 9th loading. Course I do anneal. The 9th loading primer pockets are probably close to done?They Only Rreason I Ackley Improve a chamber is for they increase in powder charge from they extra case capacity. The cases never seem to last long enough to have to trim them or take advantage of some of they other benefits this chambering offers.
Dean
Look at some site like Midway for .25-06 Hornady seating dies.I looked at the Hornaday site and did not find a 'generic' seating die. I'm just edging in to AI and would appreciate your clarification on exactly which die you are using.
Me likeSome photos:View attachment 252686
The Hornady seater is in the middle left and to the left of the die, right to left: 6mm-06, 6mm AI. 6mm Rem, .243W. The same die upon adjusting in press will seat 6mm bullets in all 4 cartridges.
Nothing new? At the right center is an antique .30 caliber Vickerman seater die having a spring loaded sleeve with a loading window to hold and guide .308 diameter bullets into a seating stem that is partially visible. To the right of the Vickerman die are a .300 WM and .308 round. The stubby short .308 round is perched on top of an extension to allow the brass neck to reach up into the bottom of the Vickerman seater. Many .30, 168 Sierra & 168 Hornady bullets were loaded for .308W match shooting some 54 to 60 years ago using the Vickerman seater ( the window speeds things up). Many 190 Sierra Match Kings and other .30 bullets have also been loaded into .300 WM loads from then to recently.
The 6mm bullets are: 105 AMax in .243 W & 6mm-06, 105 Hornady hpbt in 6mm, and 87 Vmax in 6mm AI.
I am still working on a moderate size stash of 6mm 105 AMax bullets.
The .30 bullets are 178 ELDM in .300W and 125 Speer TNT (bang-zip-splat) in .308W.
Two dies seat bullets for 6 cartridges.
Yep, exactly the point I was trying to make in #60 for @Lonewolf74.My brass is adequately fireformed at chamber pressures of about 60K PSI - this is after COW fireforming using full charge loads with bullets.
Two dies seat bullets for 6 cartridges.