300 Blackout bullet in a .30-06

USSR

USSR

Finger Lakes Region of NY
I am looking for an accurate load at whatever the velocity is (it's a plain base bullet, so no hotrodding it), for use in my 1968 built Winchester Model 70 Target Rifle with Unertl scope. Having read some old Lyman articles about rifle cast bullet shooting, they used harder bullets, so I just cast a bunch of bullets using a Lyman #2 alloy. The solids as cast are weighing about 234gr, and the hollowpoints about 227gr. This is a bore rider bullet, and the base is coming out at .312" - .313", while the bore rider part is .300" - .301". So, here come the questions. Should I size them to .310" or .311"? While there are 2 small lube grooves that I fill with BAC, would I benefit any by rolling them in White Label's 45/45/10 as well? Lastly, what powder? Here is a list of the powders I have: Red Dot, Bullseye, 700X, Solo 1000, WST, AA#2, Unique, AA#5, HS-6, AA#7, W571 (HS-7), 2400, 4227, IMR4895, IMR4064, H4350, RL19, N550, N160, and RL22. I am familiar with "The Load" (13.0gr of Red Dot), would that be a good place to start? Thanks in advance for your reply.

Don
 
Ian

Ian

Notorious member
Size to .0005" smaller than your throat entrance diameter. Try with and without the BLL overcoat, and try filling only one lube groove. Use a soft, low-viscosity lube with no metal soap in it. Try with and without the overcoat and compare the difference. Go buy a pound of Hodgdon Titegroup and start out at about 6.5 grains, increase gradually until you get a supersonic crack and back down a few tenths of a grain from that. Also, experiment with large pistol or large pistol Magnum primers as well as rifle primers.
 
RicinYakima

RicinYakima

High Steppes of Eastern Washington
Size the bullet the same as i.d. fired case neck from that chamber. 16 grains of A2400 is a good starting sport, 18 max and down to 14.5 grains. They will all be supersonic, but you didn't say if you wanted it to be subsonic. I use WLR for "standard and magnum" primers. FWIW, Ric
 
Ian

Ian

Notorious member
Long, heavy bullets don't deal with the transonic region very well IMO. Start subsonic or enough above the speed of sound that they remain so to the target.
 
fiver

fiver

Well-Known Member
that's a square plain base bullet.

I'd keep the velocity's down.
6-7 grs of anything below unique on your list would most likely do to get started, getting closer to 8 with the Unique types [except the #-5 it likes more pressure to shoot well]

I agree with Ian about trying different primers as part of the process.
I'd also try just lubing them with the 45/45 lube right from the mold.
I run the LEE-230 with just T/L and a rifle primer in the 300 BO on top of 700-X.
I wonder why I even size them half the time.
 
Ian

Ian

Notorious member
I used 7 grains of Unique to good effect with that bullet in a .30-30. Air cooled straight WW alloy. I recommended Titegroup because I've done a lot of work with 220-240-grain .30 caliber bullets and in the larger cases and found Titegroup has no equal for accuracy, clean burn, and consistency due to lack of position sensitivity at low velocity.
 
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