coopers are larger than the red shouldered. Those and the kestrels are amazing little birds. however, the impact of a coopers hawk on a dove is impressive to witness, It sounds like a professional tennis player on a serve and looks like you dynamited a pillow.
MV? you get an impact velocity around 3200 fps you will figure it out, Kirby Allen ran the .257 120 gr at 3500 fps and they would not penetrate 1 jug at 500 yards.
at right is a 160 accubond that impacted a green maple block at 3520 fps, it retained 64% of its weight and expanded diameter was .62" and penetrated over 13".
Hornady just came out with a .257 134 gr. ELDM, yes a match bullet, however my experience and experience of others over the last 4 years says they perform as well or better than the ELDX line on game. Also a 128 ELDX with a BC of .633.
level the rifle on a bipod, affix the scope, with the rifle level, line the reticle up with a plumb line, I use a post in a tennis court fence that I checked for plumb with a level. then I run the verticle adjustment stop to stop and watch it crawl up and down the edge of the post. If it wanders...
have had elk, moose, caribou, bear, whitetail, coon, armadillo, bear, groundhog, wild turkey, rabbit and more. My favorite without a doubt......Squirrel
First use cornmeal, not as abrasive on the throat
2nd 11-12 gr unique charge case, tap it on the bench to level the powder
fill with corn meal
plug with a piece of paper towel...tight
remove brake if you have one
keep muzzle pointed down
watch barrel heat cause it will get hot
clean barrel...
fill the case 2/3 full of oil, set it in the shellholder on a solid surface,, get a wooden dowl that will slide down the case neck, tap it with a hammer, the oil will push the primer out, then you can examine the pocket and flash hole. Is it possible that that brass is berdaned primed?only...
My mother years ago went into a gun shop and asked the guy behind behind the counter for collars for an RCBS flashhole deburing tool for her son (me) as a christmas gift. The gentleman asked her which caliber was he needing. She replied "he has one of everything"