DonH
posted this
31 October 2007
DonT wrote: I want to start using a bore rider (saeco) bullet in my 30-40 Krag rolling block. I have a buddy that cast me some up and here is my thought:
I want to seat them in the bore first then use a primed, fire formed case that has been charged with Alliant 2400 (18.5 grains) held in place with a 1” sq. piece of tissue paper.
Anyone see a problem with poaring only enough alox in a pan to lube the bullets slightly above the driving band? This would, hopefully, keep the lube from building up on the dies and make the lubed bullets easier to handle.
The bullets are designed for gas checks but I am going to try shooting them as cast (.310 dia driving band and .308 on the bore rider section).
Anyone see any flaws in my thinking or problems that might occur. Speed should be right around 1200 fps and the bullets weigh in at 190grs.....
Thanks in advance..
DonT:cool:
DonT;
I have no experience with the .30-40 and little with liquid alox. I do have experience with shooting cast bullets breech-seated. I recommend first of all that a bullet to be so used be cast only of a lead/tin alloy (most likely 20-1 or 25-1) due to the amount of force needed to seat an antimony alloy bullet. Second, a breech-seated bullet fired at less than 1500 fps requires much less lube than has been thought. Given fair-sized lube grooves, proper bullet fit and any good lube, lubing the driving band/lube groove portiion of the bullet should be more than enough lube to prevent leading. I can't say what, if any, effect the gas check shank will have on a bullet breechseated and fired without the check. Alox/beeswax lube should be fine if fingerlubed but I can't say regarding pan-lubing.
Emmert's lube, a blend of beeswax, Crisco and Crisco oil and with the possible of a small amount of anhydrous lanolin will do an excellent job in the velocity range you are looking at. In addition is is excellent for pan-lubing. The .32 bullet (220 gr) I use has three very small lube grooves and a similar lube has proven to work well with no leading up to 1450 fps or so. Incindentally, probably 3/4 of the bullet length is engraved by the rifling and only the grooved portiion is lubed.