.260 Remington

I went 260AI or my version, the 6.5 Mystic. 40deg shoulder so case growth was minimal despite turning things up to 11. Used to get some of the highest V bull scores when I was shooting in Open at mid range.

260R works just fine... from 308 L brass, I would anneal a bit more then usual, outside neck turn to 11 thou before necking down (don't need to create donuts for no good reason). Lapua brass will get tough to neck down if fired a few times. After necking down, check how the neck thickness went... Anneal, turn again if needed. I like 12 thou necks.... 13 thou as a max for my tastes.

Reg factory 260Rem chamber will work just fine. 8 twist for everything up to 142s. 7 twist for the heavier options.... but gains are small vs recoil.

H4831SC was my goto but likely N160 today.

LR primer and have at it.

Jerry
 
maynard said:
I have been shooting target rifle with a jacket and sling for over 30 years. Back in 2020 I broke my left shoulder into 4 pieces. First surgery resulted in a plate and 11 screws to hold everything together. Second surgery, a year later, the hardware came out. I am a right handed shooter but just can't get the reach that I need with my left arm to get into a prone position without a lot of pain.

I have several .308 target rifles, most have 1:11" twist so I should be able to shoot 175 gr bullets and maybe 185's. With 40 years as a tool maker I am pretty sure I could turn my prone stocks into bag riding F-class type stocks. This should cover F-TR.

I recently picked up a McMillan F-Class stock that is set up as a barrel clamp stock. Free floated action and barrel just clamped in a block in front of the action. This is what has me thinking of a .260 Rem for a open F-Class gun.

This leads me to another question about necking down cases. I have a couple thousand .308 Lapua cases. How hard is it to neck down these .308 cases to .260 Rem. I really don't want to get into neck turning unless I absolutely have to. I would prefer a no neck turn chamber.
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I just went down to the reloading room and did the following: I used my Redding .260 competition die set. I ran a 308 Lapua case into the body die which sized the neck nicely, then the bushing die did the rest. It works perfectly.
 
remington jim said:
There are people still shooting the Lapua but the 6.5 CM have pretty much obsoleted it too - same as the 260R . RJ
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Nothing obsolete about 260 or the 6.5X47. The latter was never a chambering for factory rifles and still holds a boat load of records The CM was just a marketing success, it doesn't do anything "better".
 
paperslayer said:
Nothing obsolete about 260 or the 6.5X47. The latter was never a chambering for factory rifles and still holds a boat load of records The CM was just a marketing success, it doesn't do anything "better".
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Your right it does Not ! Nor did I say it did 🤷🏼‍♂️ But for every one 260 or 6.5 L out there shooting on the line there is 25 more 6.5 CM s . Fact IS it’s replaced Both those cartridges mostly 👍
 
Harwood said:
I run a 260 for ORA PR. I have resized a fair amount of Lapua and Petersen 308 to 260. As people said a single pass through the sizing die does the trick.

Both JC and IBI prefits chamber it without any further effort.
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I've had issues resizing 308 down to 6.5 or 260, with collapsed shoulders. I also used Lapua cases (New)

I ended up doing it in two steps, using a 7-08 sizing die for the first pass, before using the 260 rem sizing die.

No issues at all with this.

I did try some small primer cases, which were necked down from 308 cases. I didn't notice any accuracy differences.
 
remington jim said:
Your right it does Not ! Nor did I say it did 🤷🏼‍♂️ But for every one 260 or 6.5 L out there shooting on the line there is 25 more 6.5 CM s . Fact IS it’s replaced Both those cartridges mostly 👍
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RJ, match shooters are a fickle bunch when it comes to "new" fantastic cartridges. Sort of like the "new hooker" on the block?

When a barrel wears out or loses competitive accuracy, what better time to try out a new girl????

It's fun though, and I fully understand the appeal of new cartridges.
 
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maynard said:
Well I am too old and refuse to grow a manbun so the 6.5 CM is out of the question. lol
I am sitting on a couple thousand .308 Lapua cases so necking those down to .260 make sense, if it isn't too work intensive. Did I mention that I hate reloading? I only reload because I can't buy ammo as accurate as I can make myself.
Now I guess I have some more homework to do about what chamber works best and what twist rate to choose.
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You need to find someone who likes sizing brass. If you find such a person let me know.
 
paperslayer said:
The CM was just a marketing success, it doesn't do anything "better".
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The CM does better when it comes to shooting heavy (for caliber) projectiles from mag length OALs.

I know people love to get butthurt over 6.5 CM, but the .260 Rem was never properly supported by Remington. It never had a chance. You may call the 6.5 Creedmoor just a mere "marketing success", but properly supporting a cartridge is tantamount to its survival.
 
Desert Precision said:
The CM does better when it comes to shooting heavy (for caliber) projectiles from mag length OALs.

I know people love to get butthurt over 6.5 CM, but the .260 Rem was never properly supported by Remington. It never had a chance. You may call the 6.5 Creedmoor just a mere "marketing success", but properly supporting a cartridge is tantamount to its survival.
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Mag length... Whoop-dee-doo! LOL Swede still outperforms the CM with "Heavy for Caliber" bullets; actually originally designed for 158 gr. back in 1896. It is still around after over 130 years. Even the old military rifles had very fast twists.

Manbuns and Lulu Lemons don't make up for good old powder capacity. If you need more than the Swede gives, then 6.5 x 55 AI.

Will be Creed be here in 130 years? Only time will tell. By then, if Hornady is still around, I'm sure they will have muddied the waters even more with dozens more redundant fad cartridges.
 
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