Getting started with the 300blk ...

[fiver]

that's a gas check shank?

I'd probably make band 2 and band 3 a drive band so it could be lubed even with the TL point in the middle.
then take some of that back band off for a better shank length.
that would still move the COG back just a smidge to the front of the crimp groove.

dropping the diameter to 309 as poured from ww alloy would also help since 309 is usually plenty when shot naked.
that's probably the best compromise I could come up with when shown that bullet and asked to make it work multiple ways.

I'd want to mess with that front section some too just to bring the weight down a bit and move a bit more bullet up into the neck and out of the case.

 

[popper]

Neither of mine will take anything larger than 309 even with turned necks (0.010"). They have a very slight throat taper right at the bore that makes the seating depth critical. All the bands make change of seating depth difficult. Pointyish nose does let you load longer & feed good. I've got some loaded sized 307, then PC and just touch with 309 sizer - to see if less disturbed alloy shoots better.

 

[wquiles]

I'm using the 184C

I like that design - I like/prefer flat points myself

 

[wquiles]

This is the NOE bullet that should have been perfect per my recommendations except for the nose taper, check shank, and the bands are too large against my recommendations. The taper needs to be a 1.5° included angle and the body needs to be about .309". I wouldn't put a gas check on it, but if one wanted the option, the check shank needs to be at least .070" long and .284" parallel instead of that short, goofy taper. Fix those things and it would be a great bullet.

Ian - are you using cast bullet software such as this one for your ideas?
Precision Cast Bullet Design ~ Version 5 ~ Software

 

[Ian]

No, I still use crayons and a Big Chief tablet.

 

[Brad]

He steals them from a cute little girl he knows.

 

[fiver]

if your gonna buy one that one from Tom Meyers is the one to get.
he has that basic version and then an upgraded V-5.
if your gonna mess around with bullet designs that program will burn some late night electrons no problem.

 

[wquiles]

Hope to get to the range soon to try both of these out:

 

[popper]

185 sized 3085 - mark is where the taper starts in the throat - an if longer will jam. Make a slight reduction in dia. below this if PCing. Further down lets you seat longer. Shot a couple @ 50 before Christmas and got 1/2" CTC apart with big drop (scope set for 100 & 150 SS). Guessing 1200 or so, = nice 40SW carbine load.

 

[wquiles]

Went to the range today with my daughter. I didn't try groups at 50 yards, as I just concentrated on the chrono and ar15 functioning - now that I have the Lab Radar figured it out, it works great:



Using QL, I tried two loads with each weight to see what worked best - temp was about 60F - groups of 5x shots:

215gr with 8.5gr H110 (COL of 2.101"): didn't quite cycled 100%
Ave = 988fps, ES=27, SD=12

215gr with 9.0gr H110 (COL of 2.101"): 100% cycling - this is probably the one to tweak for accuracy
Ave = 1036fps, ES=25, SD=10

245gr with 9.0gr H110 (COL of 2.101"): didn't quite cycled 100%
Ave = 1057fps, ES=28, SD=12

245gr with 9.5gr H110 (COL of 2.101"): better, but not quite 100% cycling
Ave = 1081fps, ES=42, SD=16

 

[popper]

Went today, with the magnetospeed, think it is working OK now. Loads (142 & 170 ) with cfe pistol ran 1300 or so (where I want them) but 9gr 2400 was also. Sure feels different. 142gc with H110 ran 1800 as did the 125SST with cfeblk.
Shooting just a little left and high, need to put it on bags and check scope.

 

[popper]

Had a 300BO neck separation in the sizer last week. PNK ARMS 300BLK HS. Miked the case wall, 0.015 for as deep as the mic would go. Now straightwall brass. Inside has another 'crack' below the fracture. I don't consider it reloadable brass. Appeard to be once fired range pickup. No extactor swipes or anything, no bent rim.

 

[Spindrift]

@popper ; good thing you discovered in the reloading room, and not on the range.

 

[popper]

PNK is defunct now but some may be around still, midway has no stock but CTD may. You can see the 2nd crack in the case. If really once fired, bad stuff!

Played at the range today, fun with BO pistol and 30/30 light loads. Adjusted the BO 3x scope to right after POI was up and left with slow loads, too much.

 

[waco]

All this 300blk talk got me to PC some Bullets tonight for my RAR.

 

[Ian]

Let us know how they shoot, Walter. I'm having yawing troubles again with the Lee 230 in my Savage 111 .308.

 

[waco]

Lubed up with BAC and a 10.8gr charge of CFE BLK the did right around an inch at 80 yards for five shots. Gonna give the pc a try and size to .309” vs .311”

 

[popper]

Can't figure this out - case that busted in sizer. Broke going into the die, neck is correct, shoulder still there and below the shoulder got re-sized into the case wall. I've buckled the shoulder on a 30/30 before, didn't look like this. Popped the neck right out of the die so was lubed OK. Fired in a long chamber? No marks on the head , H.S. is very good - assume no over pressure. Lee die. Heard of the pin pinching the neck on removal causing separation, usually at the shoulder.

 

[Spindrift]

Did you use the Lee collet die?
If you put pressure on the collet die with no brass in it, the collet can bind. It will wrinkle the next piece of brass, and it looks a little like that. I have polished and lubed the gliding surfaces in my LCD’s to avoid this kind of thing.

 

[popper]

Nope, FL die with decap pin in it. Only thing I can figure is a long (shoulder moved forward) case that was fractured (couple places ) inside. Crunched going in and no force needed to pull it out. No big deal just so unusual.