Receiver size vs magazine length

[H3R3T1K]

I understand that short action cartridges have a maximum COAL of 2.8". Now I also understand that you can have a rifle custom throated to extend the max COAL if the magazine is long enough. So since there's a magazine opening of a given length on the underside of the receiver there must be a limit to extending COAL for a given receiver size, right? What dimensions determine receiver size?

 

[Certaindeaf]

I had an old Savage bolt gun in .223.. I bought it brand new. The action was the same length as that for the 30-06.

 

[lefteyedom]

All Model 70 Winchesters had the same length action. When Savage was hurting years ago they stop making the short action and adapted the magazine well with spacers/blocks for the short cartridge. This is how Winchester adapted their rifles to shorter cartridges.

The limit to how long a case could possible would depend on what the longest bullet for the caliber and how little length of neck would be required to hold it.

The problem is that each cartridge is a balance between powder volume and pressure limits. A 30/30 single shot with enough freebore could be load with a 240 grain bullet, the end result would not be worth the effort. A 300 Winchester with a long throat could be very useful when it is load with 200-240 grain bullets.
just saying

 

[H3R3T1K]

So what's the reason that Sako makes different action sizes for 308 based cartridges and the short magnums as well as 06 based cartridges and medium length magnums? In order to use longer mags for loading bullets further out in the magnums? What's the reasoning?

 

[lefteyedom]

For Sako My guess is that it is marketing,
FYI
The US Army built there 308 sniper rifles on long action Remington 700 actions with the idea that they could be converted to 300 Winchester at sometime.

The USMC built their 308 sniper rifles on short action Remington 700. because that is what they wanted.