308 Tight Bore?

[Pusher591]

What is this? I have seen some builders say the bore is a tight bore and give a .298 dimension. Whats the diffrence's in that and a regular .308 match barrel? Also if there is a diffrence whats the advantage of it? Will it last longer or wear faster since it is a tighter bore? Would assume wear faster but maybe give higher velocities over regular match barrel.

 

[Hateca]

Re: 308 Tight Bore?

Standard for .308 is .300-.308. Tight bore is .298 or .299-.308. Tight bore will normally yield higher velocities with the same amount of powder, same velocities as factory ammo with less powder, or higher velocities with a shorter barrel.

Wearing out faster, so far haven't seen that. Shooting hot and hard will wear the barrel out faster then anything except maybe over cleaning it.

 

[kombar]

Re: 308 Tight Bore?

Krieger tight bores can be had in .298-.3065, .307, and .3075. If you plan on shooting bullets with short bearing surfaces, then a tight bore might be beneficial to barrel life.

 

[gme]

Re: 308 Tight Bore?

commonly used on Palma guns, they work well with the 155's where you need to get velocities in the 2980+ range

 

[Pusher591]

Re: 308 Tight Bore?

So is it a chambering thing? I have heard people chamber their guns in .308 Win, 1995 Palma, exc. Thinking about building a gun. Would it be good to do a tight bore with 1995 palma chamber. Will be a work/target gun. Mostly target. It is going to be 18.5 inch barrel. Will mainly shoot factory loaded 155's,Hornady TAP 168, and FGMM 168.

 

[Hateca]

Re: 308 Tight Bore?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: k9222</div><div class="ubbcode-body">So is it a chambering thing? I have heard people chamber their guns in .308 Win, 1995 Palma, exc. Thinking about building a gun. Would it be good to do a tight bore with 1995 palma chamber. Will be a work/target gun. Mostly target. It is going to be 18.5 inch barrel. Will mainly shoot factory loaded 155's,Hornady TAP 168, and FGMM 168. </div></div>

Chamber and bore diameter are two different things. Talk to the rifle builder on your wants. The Palma reamer can be used but a lot of builders use the Palma reamer as a base then have it modified for bullet type and even brass maker.

 

[Pusher591]

Re: 308 Tight Bore?

Cool <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: HateCA</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: k9222</div><div class="ubbcode-body">So is it a chambering thing? I have heard people chamber their guns in .308 Win, 1995 Palma, exc. Thinking about building a gun. Would it be good to do a tight bore with 1995 palma chamber. Will be a work/target gun. Mostly target. It is going to be 18.5 inch barrel. Will mainly shoot factory loaded 155's,Hornady TAP 168, and FGMM 168. </div></div>

Chamber and bore diameter are two different things. Talk to the rifle builder on your wants. The Palma reamer can be used but a lot of builders use the Palma reamer as a base then have it modified for bullet type and even brass maker.</div></div>

Wanting something that will shoot the ammo that I mentioned before very well. Dont have time to reload so I will be shooting mostly factory stuff. Is the Hornady 155 palmas any good? Also do you still have the 002 for sale? Its on your page as forsale. If I were to buy it could it be cut down to the 18.5 w/SF brake like the 001 Guardian?

 

[salmonaxe]

Re: 308 Tight Bore?

I have a 298-.3065 tightbore krieger 12 twist finished off at 18". Mine has whatever standard .308 chamber that my smith (Wi50) normally uses. (PTG I think. I'm not sure on the specifics.) I told him that I might want to run something heavier so we ditched the idea of a palma chamber. Also it gave me piece of mind since mainly I wanted to shoot surplus ball.

Mine shoots M852 at the published velocity of 2550 ft/s. I thought that was pretty good since the barrel was basically 6" shorter. Also South African ball shot MOA, which I was happy with.

 

[BLAWTON]

Re: 308 Tight Bore?

http://www.snipershide.com/forum/ubbthre...rue#Post1315768