45-70 at 1000 yards?
Honestly I never heard of a 45-70 being able to shoot 1000 yards accurately
Creedmoor matches started in the 1870's, there were no plastic rifles and smokeless powder..
Lots of us shoot in bpcr competition to 1000 yds. Even women and kids do it.
Here's the results of a match held in Phoenix recently.
http://www.arizonasharpshooters.com/ They shoot creedmoor at Lodi Ws. every month, the Nationals at the Whittingto Center are coming in July,this time of year there's a "buffalo" gong match about everyweekend somewhere with targets to 1000 and sometimes even a mile,,, the list goes on and on...