Shooting Shirt Action Calibers in long Actions

Are you planning on single feeding or mag feeding? single feeding it should be no issue, however in some blind mag or magazine fed rifle you'll run into issues with the bullet's nose diving and hitting the front of the mag well or mag follower due to uneven spring tension on the follower.
I converted a T3 from a short action configuration to a long action mag with 308 win. Feeds ok and allows you to seat the bullet closer to the lands. Although it's not ideal.
 
Ok..someone has a 7mm rm action for sale.
I was interested in building a 284 win.
Single feed is fine with me..it will be a bench rifle.
I would have to replace bolt though as the bolt face would be different I suppose.

Is accuracy affected?
 
The base question of running short action calibers in long action is actually quite a sensible and wise thing to do.

Specifically if running a long range 308 for example along with long heavy bullets chambered and loaded as long as possible for maximum case capacity.

Most guys cannot eject an F Class competitive live 308 round from a short action Remington for example.

When a cease fire is called during a match, the bolt release must be used to get the extra stroke to allow the tip of the bullet to clear the front of the ejection port.

I know guys with the same problem running 6.5-284.

As for changing the bolt face to a larger size... that's not as bad as some would assume it to be.

I actually have a 308 that started life as a disappointing Rem 223 PSS.

The bolt face was enlarged and the extractor was converted to a Sako, which is a good thing to do anyways... and recommended.

I have no problem with that rifle... except that my loaded F class rounds are a pain to eject... for reasons stated above.

I can always load shorter rounds and they feed and eject just fine.
 
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I have a 284 built on an older Rem 700 long action, it works perfect, never had a round hang up and if you aren't used to it you would think it was skipping over the cartridge because it so smooth but it has not failed yet. I can load the 284 way out past 3", in fact I think I am at about 3.185" with the 180 grain Lapua Scenar.
 
Tikka made both their M55 (a short action) and their M65 (a long action) in .308w... so its a 'factory' thing too. Fwiw
 
If you want a bench gun I suggest you buy a single shot action. I would buy a long one, because a 284 with a long match bullet seated out to make room for powder is a "long" cartridge,

The single shot action has 3 major advantages.

1. You can add a third action screw, in the middle of the action, to reduce action flex on firing.

2. Stiffer action to better support a heavy barrel.

3. Much more area for bedding under the action.
 
I have a 284 built from a used f-class barrel, I did it on a rem 700 270, I did have feed problems from 270 magazine. My gun plumber very slightly opened up the bolt face as the stupid rebated 284 face would hang up in bolt, then I switched from the 270 clip to a mag rem clip and that resolved partially the feed problems but not to the required dependability for a hunting gun. Then I purchased a "Quick-clip" bottom metal, which is a center feed and now have a rifle that I load pretty much the same round as my f-class ammo. I use berger 180 grain VLD Hunting bullets and the rifle will shoot 3 shots pretty much touching at 100m, 4th shot tells you the spaghetti noodle is hot and starting to move. If you want a target quality 284 you will definitely need a long action.
 
Isn't this exactly what the US Army did for decades with their Remington 700's ? .308 in a long action ?

This is why it was so easy for them to move their 700's over to .300 wm ?
 
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