303 British sub-sonic loads with NOE 311 247 gr bullet

[jfd444]

I went out today to try out some cast bullet loads in my No4 MK1* T. I ordered the 245 gr 300 Blackout bullet (look like NOE 311 247 gr bullet) from Missouri Bullet Co un-sized with their Hi-Tec coating. These are 20 BHN, 0.312" and weigh 238 gr. I wanted to stay sub-sonic so loaded up some rounds with Bullseye (3-6 gr) and Trail Boss (9-10 gr). I shot the following results from prone at 25 yds with the factory peep sights except for the 10 gr load which was shot by Garrett.
Rem case Neck-sized
Win LR primer
OAL 3.09"
Temp 62* F

6 gr Bullseye - Avg 897 fps, SD 6, 5 shots 1.17"
5 gr Bullseye - Avg 795 fps, SD 5, 5 shots 2.07"
4 gr Bullseye - Avg 684 fps, SD 15, 5 shots 1.17"
3 gr Bullseye - Avg 558 fps, SD 12, 5 shots 1.47"
9 gr Trail Boss - Avg 969 fps, SD 4, 4 shots 0.83" (3 in 0.060")
10 gr Trail Boss - Avg 1023 fps, SD 6, 4 shots 0.61" (3 in 0.03", 0.342 outside to outside) :bigsmyl2:

I only had enough brass ready to load 4 each of the Trail Boss loads.
I plan on testing the 10 gr load at longer range to see just how well it can really do. I also plan to do more testing with loads below 3 gr of Bullseye to see just how quiet of a load I can get. ALL of the above loads were quiet enough to shoot without hearing protection (sounded like a firecracker).

[UBER7MM]

Great load development! Sounds like you've found the sweet spot.

[pacomdiver]

how much are they? might work good in some mosins too

[Tackleberry41]

What sort of twist does an Enfield have vs the 9.5in of a mosin? WOuld like a heavier bullet than I am running subsonic, but hate to lay out the cash for a mold if its not going to stabilize.

[jfd444]

$40 for 250. Enfields have a 1-10 twist.

[RogerDat]

Missouri Bullet Co. and some of the other reputable cast bullet suppliers are a good way to get a batch of bullets to test fire before buying the mold. There is also a forum here devoted to swapping small amounts of bullets to meet the same need.

[Tackleberry41]

Took a chance on a mold, been wanting a good one in GC. Bought their 314 198 gr, but have not had the GC version in stock forever. Work good subsonic, but hard to speed them up much. Wonder how the heavy bullet would do full power thru my cetme.

Never used bullseye, just never bought any. Is it much different than tightgroup? I have been using solo 1000, since I have a whole bunch of it. 8.2gr w a 200gr gets 1030 or so in my mosin.

[kc2gvs]

I'm having alot of trouble finding either Bullseye or TrailBoss in my area. I have some Blue Dot and HS-6, any thoughts on a min/max for either of those to get similar results? I have sone of those 247's and they seem to fit nicely in my '43 No4 and my '45 No5 and I want to see if they might work as well as you got them to in your rifle...