It is often a useful compromise, yes.Is 100 yards the best distance to determine if a load is worth pursuing?
Add to that 10 round groups. 5 round is only an indicator for initial work ups. 10 rounds groups give you a lot more substantial proof as done by the military (including aberdeen) and accuracy shooters for a long time.The late Creighton Auddette always fired his ladders at 200 yards. Randolf Constantine recommended moving them to 300 yards when he first wrote the idea up. Even Dan Newberry has a lot of 300 yard data. Though his OCW system does let you work closer up, you are then almost entirely dependent on chronograph readings to discern a velocity consistency problem. Going beyond 300 starts to make wind too significant, and it gets harder to factor it out from mechanical precision.
Just my opinion. YMMV.
FOr the moment work up you load and then decide what you want to do with that info. I shoot with a rifle I know both warm and cold barrel.Thank you all for the information, it's very much appreciated!. My .308 VTR is out for trigger repair right now, but when I get it back I'll be starting my testing. I've also been reading about cold bore and fouled bore, should I ignore those factors early on or take note of those factors as well?
Got a question, have you fired rifle yet? I know some have mentioned 5/10 shot groups and was wondering since rifle has 22" barrel with factory muzzle brake does noise level bother you with hearing protection?Thank you all for the information, it's very much appreciated!. My .308 VTR is out for trigger repair right now, but when I get it back I'll be starting my testing. I've also been reading about cold bore and fouled bore, should I ignore those factors early on or take note of those factors as well?
yes I've had the rifle since 2009 and have conservativly put 700 rounds through the gun. Recently I've gotten into hand loading and seek perfection... The noise is no problem with cans or plugs, but fire that bad boy without hearing protection and you'll be ringing all day!Got a question, have you fired rifle yet? I know some have mentioned 5/10 shot groups and was wondering since rifle has 22" barrel with factory muzzle brake does noise level bother you with hearing protection?
100 yards is a fine place to start testing a big game rifle.I will be using the rifle for hunting game as well as paper. Of course accuracy is the long term goal, but I'm currently looking to develop a load that will work well for shorter distances, 300 yards and in. I'll be testing 165 grain and 168 grain bullets. I've found 47 grains of Varget work well with the 168 grain BTHP, I'm also using Hornady 168 AMAX with the same load and I'm working Hornady 165 grain SST into the mix as well. From what the books say there should be little difference. between these varied bullets. I've worked up 10 rounds of each for a comparison on groupings. The gun was zeroed using 168 grain Hornady BTHP at 25 yards. The zero group was under a nickel at that distance. Please tell me if I'm going about this in the wrong way.
I have to slowly fire five or six foulers and let the barrel cool down to until it's warm but not "too cool." I've found different powders require a different number of foulers to get the barrel to toe the line once we start shooting for group. Jus' my opinion, but I think just two or three foulers is not going to coat the bore with enough carbon dust to make the barrel "settle in" and produce good groups. You can try that few then just for grins, try doubling your original number. The key is to let the barrel cool down and the carbon dust to somewhat dry out ("flash off")before you get down to business. The stuff is kind of oily when it's hot. Then it dries to a firm, powdery state. That's when you shoot for group. If you leave the stuff in there for months (my .223 Howa, last fired in September and not cleaned), the stuff turns dam-ned near into concrete.To eliminate [any] Cold Bore influence, I'll fire 2-3 warm-up rounds.