Sure. A Sportsman 78 is just an ugly 700 with a cheaper trigger. Any 700 part can be used on it.
ADL OR BDL? There is a difference.
You will probably have to contact a barrel maker.
Do a search for Jarvis. They make a bull barrel for the $597, it runs $198 in either blued or stainless.
A while back there was a long action version of the Savage Model 12 (I think it was the 112BVSS) that was chambered in 7mm Remington Magnum. The last I ever really heard of them was back in the late 1990s. I've not seen anything about it since then. For now the only manufacturer that makes a bull barrel 7mm Remington Magnum is Remington, their Sendero line, as a matter of fact.
Value of a smith and western model 581 357 magnum crome with 6 inch bull barrel
100-500
Just picked up a savage .270 WIN. in a model 116 with bull barrel. From Shiptons Big R in Billings,Montana.PH:406-652-9118.
It will vary with the maker of the bull barrel.
You will have to contact barrel makers or visit their web sites to see if anyone is making them or would be willing to. Jarvis makes aftermarket "Bull" barrels for the Remington 597 in .22lr, but they no longer make the .22 Magnum barrel - I bought the last one a year ago
No. HBAR is an acronym forHeavy Barrel. Also, referred to as a bull barrel. These are common barrels used in match or competition model rifles.
Barrel diameter
No way to answer witout knowing the maker's name