.30 cal LBT PP mold ????

[gtim88]

Veral,  I have an LBT mold that casts a 30 cal 175ish grain bullet.  The nose measures .310" and the shank measures .295".  I've been trying to work up a load in 308 win with no promise as of yet.  I've tried several different types of paper, sized and unsized, with a light charge of blc-2.  The rifle I am working with is a savage model 10.  The bullet has to be seated very deep in the case, or it will not chamber.  When the bullet is seated, all that is exposed is the nose and about 1/16th" of the wrapped shank.  I am casting with wheel weights and dropping them in water.  I've been lubing the patched bullets with johnsons paste wax prior to sizing them to .309 and then loading them.  What am I doing wrong?  Do you have any special instructions for wrapping this particular bullet?  I am confident this bullet will be a good shooter,  and I am also confident that I am doing something wrong. 

Thanks for any help you can offer.

Tim

[Veral]

  If the bullet cannot be seated with it's base enclosed by the case neck you'll be restricted to very light loads.  It appears that your riflle throat and cartridge neck combined length is far shorter than the bullet is designed for.

   The molds I make with full size front drive bands and smaller shank are GOP design, which means Glue On Patch.  Computer labels are easiest to cut patches from, and should be cut square on the ends, with the length just long enough to overlap slightly on the second wrap.  Let the patches cure on in a warm sunlit window for a few days, then smear with LBT blue soft lube.  you can then size if you find it mandatory, but it's better not to size.
  Yes, I have very detailed instructions for GOP bullets, which are sent with each mold ordered.  If you'd like to purchase the instructions, send $2 and ask for GOP instructions.

[gtim88]

Thanks Veral.

After my first post, I've gone through every page on this forum and found a few other post pertaining to the gop bullet. I had figured a throat reamer was in order, or a different rifle for this bullet.  I'll be getting some of the lbt blue for this project and possibly another mold or two when this project comes together.

Again Thanks
Tim

[Veral]

  If you ream a rifle throat, don't use a reamer more than .002 larger than nonimal groove, and that with a gentle taper at the end.  For jacketed use, the ball seat, or straight part of the throat, should be close to jacketed diameter, even if it doesn't clean up the lands.  i.e. Should a 30 cal have a .310 groove diameter, a .3085 ball seat will provide the best accuracy, but the gun won't work well with cast, which has to have a plug fit.  The ball seat will have to be a little over groove diameter for cast, and live with decreased accuracy when you want to use jacketed.  A good general presumption is that if a rifle has a very large and long throat, the heaviest bullets for the caliber will probably shoot most accurately, because they tip less.  This only if the rifling is fast enough for the heaviest bullets in that caliber of coarse.