Quote from: rsterne on March 09, 2021, 07:42:42 PMNot familiar with the term "ELR".... or "PRS competition", for that matter.... As far as "weight downrange" having a better BC, that will apply to some extent if you keep the caliber constant.... but BC is really connected to the Sectional Density, which allows you to compare calibers.... A 120 gr. slug in .35 cal will have the same SD as a slug half that weight in .25 cal.... with the BC then being a matter of the Form Factor (shape).... A 60 gr. slug in .25 cal will be more slender than a 120 gr. in .35, so the .25 cal would likely be less affected by the wind than the .35....Pellets have a much poorer BC than slugs, so if you are really interested in the best performance in a crosswind, with a moderately powered PCP, I would look to a slug shooting .22 or .25 cal.... My favourite long range PCP is a .257 of about 140 FPE, shooting a 70 gr. slug at 950 fps.... The Lyman 257420, or one of its variants, is a great 200 yd. slug in a 14" twist.... This is not to say that you can't do as well, or even better, with a really powerful .30 or .35 cal.... but since FPE and air use is proportional to bullet weight (at a given velocity), and the FF advantage actually lies with smaller calibers.... I'd just as soon avoid the extra recoil and air requirements just to break even on performance....BobGood answer, It makes sense of course. I don't know why I didn't think of this. It is the same with powder rifles, a 6mm round is more slender and posses a better BC than a 7mm or 6.5mm. ELR = Extreme Long RangePRS = Precision Rifle Series
Not familiar with the term "ELR".... or "PRS competition", for that matter.... As far as "weight downrange" having a better BC, that will apply to some extent if you keep the caliber constant.... but BC is really connected to the Sectional Density, which allows you to compare calibers.... A 120 gr. slug in .35 cal will have the same SD as a slug half that weight in .25 cal.... with the BC then being a matter of the Form Factor (shape).... A 60 gr. slug in .25 cal will be more slender than a 120 gr. in .35, so the .25 cal would likely be less affected by the wind than the .35....Pellets have a much poorer BC than slugs, so if you are really interested in the best performance in a crosswind, with a moderately powered PCP, I would look to a slug shooting .22 or .25 cal.... My favourite long range PCP is a .257 of about 140 FPE, shooting a 70 gr. slug at 950 fps.... The Lyman 257420, or one of its variants, is a great 200 yd. slug in a 14" twist.... This is not to say that you can't do as well, or even better, with a really powerful .30 or .35 cal.... but since FPE and air use is proportional to bullet weight (at a given velocity), and the FF advantage actually lies with smaller calibers.... I'd just as soon avoid the extra recoil and air requirements just to break even on performance....Bob