Badlands Precision Bullets thread - From BC to terminal ballistics

[RH300UM]

Well N570 didn't give me the desired results. From 93 grains up I used a drop tube to get the powder in for seating a bullet.
Onto RL26 now.

 

[Reemty J]

RH300UM. Thanks for your effort, this is very interesting!!!

 

[FEENIX]

View attachment 426485View attachment 426484
Well N570 didn't give me the desired results. From 93 grains up I used a drop tube to get the powder in for seating a bullet.
Onto RL26 now.

Barrel length?

 

[RH300UM]

Barrel length?

24"

 

[JTH]

View attachment 426485View attachment 426484
Well N570 didn't give me the desired results. From 93 grains up I used a drop tube to get the powder in for seating a bullet.
Onto RL26 now.

Velocity with N570 doesn't seem bad for a 250 grain pill, What's the goal?

 

[RH300UM]

I should have given more fundamental details
Rifle
24" 9.4 twist proof barreled RBROS build

Components
Peterson 300 NM brass. Fireformed ( at least 10 firings) Ive used this same brass for multiple tests on different loads. It's been used and abused. Primer pockets still tight. Annealed each time with a AMP machine. Sized and bullets seated with a Whidden custom die set.
Federal 215 GM primers
Powder measured with a RCBS 1500 and cross checked with a A&D Newton EJ-123 High Precision Portable Scale
Seated the SDB-2 @.030 off the lands

I probably forgot something but that's the basics

 

[RH300UM]

Velocity with N570 doesn't seem bad for a 250 grain pill, What's the goal?

3000 fps is my goal

 

[nralifer]

3000 fps is my goal

 

[Reemty J]

Your within a hair, what about groups?

 

[nralifer]

Are you going to use this bullet to hunt with, and if so, what are you hunting, and at what altitude? 24" barrel is a nice size to hunt with and at 2900 fps at 5000 ft elevation corrected for standard conditions at 1200 yds you are at 1920 ft lbs of bullet energy and1860 fps. Not until 1400 yds do you get down to 1711 fps which is still within the expansion velocity for that bullet. Nothing wrong with trying to get 3000 fps MV but the additional pressure you will need is high. Your muzzle energy is already 4660+ ftlbs, more than a 375 H&H or even a 375 Ruger.

 

[nralifer]

Are you going to use this bullet to hunt with, and if so, what are you hunting, and at what altitude? 24" barrel is a nice size to hunt with and at 2900 fps at 5000 ft elevation corrected for standard conditions at 1200 yds you are at 1920 ft lbs of bullet energy and1860 fps. Not until 1400 yds do you get down to 1711 fps which is still within the expansion velocity for that bullet. Nothing wrong with trying to get 3000 fps MV but the additional pressure you will need is high. Your muzzle energy is already 4660+ ftlbs, more than a 375 H&H or even a 375 Ruger.

Remember the BC of that bullet, 50 gr lighter, is on par with a 300 gr Berger.

 

[RH300UM]

Your within a hair, what about groups?

First 9 shots with this bullet. No group test yep

 

[RH300UM]

Are you going to use this bullet to hunt with, and if so, what are you hunting, and at what altitude? 24" barrel is a nice size to hunt with and at 2900 fps at 5000 ft elevation corrected for standard conditions at 1200 yds you are at 1920 ft lbs of bullet energy and1860 fps. Not until 1400 yds do you get down to 1711 fps which is still within the expansion velocity for that bullet. Nothing wrong with trying to get 3000 fps MV but the additional pressure you will need is high. Your muzzle energy is already 4660+ ftlbs, more than a 375 H&H or even a 375 Ruger.

Yes it'll be used for hunting
It'll be used from sea level to 10k+asl
Bears, deer, elk, wolves, moose

 

[Aloeus]

@nralifer Just got done listening to Erik Cortina's interview with Chase Stroud. In it Chase mentions he's run into issue with specific barrel manufacturers (and the way they cut their barrels) not shooting solids well. Just curious if you've run into that as well and if there might be some makes to stay away from if you're specifically building a barrel around these bullets? Chase didn't name any names, which was fair.
P.S. he gives you and your bullets a nice shout out at the end.