350gr XTP RL7 Strelok Drops to 300yards
http://i1259.photobucket.com/albums/...psyw2q7ns1.jpg
I didn't adjust all variables to current. But this being one of the least efficient bullets it does look good out to about 200 yards.
400gr Sierra JSP Speculation
So far this is my favorite bullet to shoot. But I continue to question its integrity over 2100 FPS. The table below isn't based on hard numbers for fps but should be realistic. If I drop the fps down to 2200 it mirrors the trajectory of the 350XTP@2500FPS.
Might get some hard numbers on the 500gr Hornady bullets tomorrow. If not it will likely be another week.
http://i1259.photobucket.com/albums/...psanzmv9r7.jpg
JBM Recoil Calculator Results
Won't have a true fps for another day or so but I input 2400 for fun. I wasn't exaggerating the recoil of the 500gr bullets.
http://i1259.photobucket.com/albums/...ps0gubuizd.jpg
350gr XTP RL7 Recoil of current load.
500gr XTP 8gr 5744/71.5gr IMR4064 results
4-shots low was cold bore.
1994 High
1954 Low
1980 Avg.
ES 40
SD 15
http://i1259.photobucket.com/albums/...ps2wzu5zc2.jpg
http://i1259.photobucket.com/albums/...ps4hstxl2i.jpg
Good results but not as good as the faster powders. Won't persue this further but good info just the same.
500gr FP/XTP over 80gr RL7
2215 High
2171 Low
2190 Avg.
ES 44
SD 14
Wide spread on the ES? Yep, just a little too hot for the primers. 4 of 9 pierced. Otherwise I am sure RL7 can do much better ES wise at least. I do need to profile or shim the firing pin but I digress 2150-ish is probably where my high node will be. Will do full workup and post detailed result when done.
I do want to give the tac a try with these before I shoot em all up. Then its all about better bullets some 4198 and 322 for some serious hunting loads.
http://i1259.photobucket.com/albums/...psgypp48iq.jpg
Its from the old 50 B&M loads 2013. Same bullet. Helps keep things in perspective!http://i1259.photobucket.com/albums/...psptcekrxb.png
Headspace is key to success!
I agree headspace was my biggest issue the first season playing with this. I am still using the opened 500 s&w die to size between each reload. Currently here is my setup.
Cheap RCBS 3-DIE CARB ROLL/CRIMP 500 S&W/SPL PN/23812
Hornady 500 S&W taper crimp
Headspaced 2.65
Trim length 2.618-2.62
Process:
Tumble wet with SS pins.
F/L size yes some stretch
Trim to 2.62 or just under.
Chamfer/deburr withh rcbs tool then lyman vld on inside. Check length adjust if needed.
Dry tumble to remove any lube ect..
Prime with RCBS hand tool. (Might try a bench mounted one see if added leverage helps with seating new cases.)
Weigh charges fill cases.
Add filler as needed to achieve desired compression. Usually just about equal to the width of the canelure or slightly less if over 100% powder.
Push start bullets in by hand.
Use the rcbs r/c die to compress load but not crimp.
Use Hornady taper crimp die for final crimp. I have been aggressively crimping.
Early on I tried to let the brass grow to chamber size and length. But ran into the issue you raised with the brass latching on to the rifling and creating all sorts of problems. Most noted extraction.
Due to lack of experience mainly it took me longer then you to figure out wtf was happening. I gladly admit my folly if it prevents someone else from repeating it.
I find it interesting your knurling to fit. This is something I've been researching lately. Looking at the possibility of using .505 jacketed bullets for the higher bc. But it doesn't look very doable. Maybe when the bore is shot out!
Still want to pickup a beowulf die set, but feeding this monster is about all I can do this year.
Again no shame in sharing the ugly!
Referring to the 2013 50 B&M data again.
It says they experience .0035 expansion using 300 RUM cases too. Not the same same but simular. I would expect .0035 would increase the size of the flash hole substancially. Maybe I won't recycle those 3 pieces yet if they will size and prime decent.
http://i1259.photobucket.com/albums/...psg5zjjhnk.jpg
Rem 9 1/2 100 yard target