Thread: Poo seventy Bush pig build How short can I go???

The Duleys said the point of their bushpig was primarily to use factory ammo and be short. This obviously skews in favour of the 270 as it has the most case capacity. It wasnt the most efficient it just had the best performance and they determined it to suit them best a the others didn't have the power they wanted with factory rounds. Its like a 16 inch 7mm-08 and 284. The 7mm08 is more efficient based on powder burnt but the 284 still makes more velocity even if its one of those extra 50% to gain 10% type deals. They had a minimum threshold and to get it they had to go to a cartridge's with a larger case capacity or reload which went against the point of the rifle.

Any rifle can go as short as you like if you wanted a 16 inch 300 Win Mag theres no reason why you cant (especially if you reload).

The things that remain the same (or pretty much the same) regardless of barrel length is
- Powder Burnt
- Recoil Energy
The things that decrease with barrel length
-Velocity
-Powder Efficiency
-Suppressor Life
The things that increase with a shorter barrel
-Maneuverability (decreased overall length)
-Shot volume

All of these things are slight initially and the more extreme the chop the more extreme effects.

One thing to consider is usually the short and fatter the case the shorter the barrel can go before velocity starts to drop too severely,
the less powder capacity also has the same effect with lower powder cases not being affected by barrel length as much.

Typically heavier projectiles increase the time in the barrel and improve short barrel efficiency as well as tending to have better BCs meaning they keep it down range.

Reloading can claw back some of the loses of a short barrel but not all and if reloading in a longer barrel the gap reappears.

A 16 inch barrel and arguably an 18inch barrel of most hunting cartridge's needs a suppressor as they are bloody loud and will mess you up. They also have the same overall length as a non suppressed 20-24inch barrel that will damage hearing but not to the same level as an unsuppressed short barrel.

Cartridge's outside 308 and small calibres typically are hard to sell if they have barrels under 18inchs on the aftermarket. Shit even a 20 inch 7mm Rem Mag can be a difficult sell.

My opinion is that short bush pigs are cheap second hand so by a 2nd hand one rather than building one. The prices for a standard t3 vs one thats cut to 16 and suppressed are usually damn near the same.