The closest 100 yd range is an hour and a half away and a 50 yd indoor range is 10 min. away. Can I get by with using the local 50 yd range for load development by simply doubling my 50 yd groups. For example, if my 50 yd groups are 1", then can I be resonably sure that my 100 yd would be 2"? Just trying to save some time and gas money, and also be able to shoot more often.