greetings wood hick,
first a little info. the twist imparts a spin on the projectile be it ball or conical to stabilize said projectile. because of it's length and weight a conical requires more spin to stabalize.
spin is expressed in revolutions per second (rps) or revolutions per foot (rpf) each projectile has and ideal rps or rpf to stabalize it. now pay attention, this is important..you can change the rps but not the rpf..
if you take a bbl with a so-called round ball twist 1-66 or slower. now drive that rascal with 110 grs powder up to X feet per second, it would not over stabalize. but, slow that rascal down to a 40gr target load for 50yd. and it mite not stabilize.
in the begining it was thought a 1-48 would be a good compromize to shoot both. and it is. for a target load it puts a lot of rps on the ball with less pain to the shoulder and can also handle stiff hunting loads without overstabilizing the ball. does a good job on conicals too. :grin:
now, someone may flame me for this but, imho, unless you are hunting deer size game with a small caliber gun, you would NOT best be served with huge charges and a rb twist. you can get all the rps you need with a 1-48.
..ttfn..grampa..
PS.. i am not 31, but thanks anyway..
PPS.. with a 1-48 you can adjust the rps for diff target distances by changing powder charge.
PPPS.. do have some 1-66 myself
PPPPS.. almost forgot to answer your question.. at 50yd. the 1-48 will be just as accurate or more accurate. because it will group good with less powder than a 1-66. recoil will wear out the 1-66 shooter.