Home Forums Reloading Big Game Rifles Subsonic 450 Bushmaster

Anybody achieving this? What's your recipe

Thanks!
Lane

Ok, so thanks to Seafire and his Blue Dot Reduced Load Data, I got to where I wanted to be

Using Starline brass and 250g XTP's with CCI 450 Mag SR primers. COL 2.071 This seats the bullet just below the cannelure. With a taper crimp. Ruger American Ranch Rifle, about 16inch barrel.
17g = 1226 fps
16g = 1159 fps
15g = 1071 fps
14g = 965 fps
13g = 866 fps
12 = 776 fps
11 = 675 fps
10 = 601
9 = 449 fps

I finished up 100 rounds with 14.9g BlueDot, this should keep it around 1050 fps or so.

This is great info. Please let us know what the accuracy is.

Sorry it took so long to get back to this. But I made a few range trips, and finished all my testing with a suppressor/silencer fitted to the Ruger. The silencer increases the velocity slightly. Ended up with 14g of BlueDot. This gave me a 4 shot group average of 1058fps and standard deviation SD=7. This was on a cold bore, group was 1.25 inches at 50 yards.


I also tried some Trail Boss powder. Long story short, 12g of TrailBoss was the best at 1020fps and SD=21. Group size 1.5 inches at 50 yards.


I also fired 3 factory rounds of Hornady Black Ammo with 250g FTX at 2218fps average, and SD=1.7 Group= .5 inches.

Hope this helps

I have been using TrailBoss for over 6 years .....Cutting Edge Bullet Handgun 240 gr. Raptor with a tip added 1025 fps with 12 gr. of TrailBoss....
Maximum distance I will shoot a buck is 70 yards I've shot several farthest one went is around 50 yards....shot a few that other deer with then didn't even spook....
I have done extensive testing in wet newspapers....beyond 80 yards CEB bullets don't expand reliably and I will not take a shot that far.....

Trail Boss is the best powder that I've used....hope they get it back in production very soon....I only have 6 cans left....

tag for future reference, good info here;
I struck up a conversation with Parker bullets about using their jacketed muzzleloader bullets in the 450 Bushmaster. They've done a bunch of load development and hunting, with great success. I didn't ask about sub-sonic loads, but I'd bet they've done some testing.