Originally Posted by primer1
Or find an accurate subsonic load. The bullet will begin to tumble when it transitions between supersonic and subsonic. Starting with a subsonic will reduce the tumble effect, but you will need more holdover to account for the lack of velocity.
Good reasoning but starting subsonic the bullet probably won't be able to make the 200 yd range. Holdover would be like shooting artillery. Not saying its impossible to lob the lead that far, just that with something like 6' of holdover its no longer rifle shooting.
Even with the fastest initial velocity a 22 is pretty marginal at this range according to my ballistics calculator. Ballistics Coefficent determines how much a bullet will drop at any range and velocity combo. Just can't get a better B.C. without increasing bullet length. This increases the weight and decreases the initial velocity. Air friction is a pain in the ass!
Ideally you would start with a ~36 grain copper solid with a good streamlined secant profile , a boat tail base and a poly point the get the highest B.C. and longest bullet possible for the weight. Think of a profile like the hornady a-max. There is a good reason that long range bullets are all very long compared to caliber diameter. Copper has a lower density so longer bullet for the same weight. About 1650 fps initial velocity, are required to stay supersonic past 200 yards, according to my calculations. Your should just be able to make this velocity with a 22 LR case and the fastest powder charged to the limit or a little bit compressed. As long as the bullet doesn't become so long it won't feed through your magazines. Wait that's the reason all us long range shooters feed single rounds by hand.
Too bad no one makes a 22 LR with this type of bullet as a factory round. Maybe someone will since Callie is going lead free...
Be poetic justice if the libretards get us to design a better bullet ...
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