Money Bullet

[ChrisF]

Is anyone using the BACO BULLET JIM459541M3 as opposed to other money bullets from BACO? I currently have a 525 and a 545 money. Looking something for my Shiloh 45-100 for 1,000 yards

[SFogler]

I have the BACO 459540M3 for my 45-100 Axtell. I will be shooting it in the 1000 yard matches at Ben Avery in March so I can verify that bullet being better. Dave at BACO told me with the Axtell's 1/20 twist this bullet would be better at 1000 yards than the slightly longer Postell I had been using. I guess I'll find out. I do know my 45-100's both like 540-545 grain bullet weights over lighter ones.

[SchuetzenDave]

Caliber 0.458 Inches
Bullet Weight 545 Grains
Bullet Length 1.475 Inches
Barrel Twist 20 Inches/turn
muzzle velocity 1300 fps
Temperature 50 degrees Fahrenheit (59 is standard)
Pressure 29.92 inches of mercury (29.92 is standard)

Sg = 1.85

Sg (gyroscopic spin factor) shouldn't be less than 1.4 (not spinning fast enough).
If Sg is greater than about 2.0, you may gain some accuracy by going to a slower twist barrel or using a longer bullet.
This bullet should work well for you since the Money noses have good dynamic balance for long range shooting as well - and better yet is to rely on Dave's advice.
Dave is pretty reliable.
I trust Chris also has a 20:1 twist barrel.

[Michael Johnson]

Chris’ 45-100 probably has the same twist as my Bryan era 45-100 Shiloh, 1/18.

[SchuetzenDave]

If he has a 18:1 twist he will be overspinning the bullet (Sg over 2.0).
This is a good thing since we deliberately wish to over spin the bullet for long range shooting (1000 yards +) to compensate for the drag over long distances.

Caliber 0.458 Inches
Bullet Weight 545 Grains
Bullet Length 1.475 Inches
Barrel Twist 18 Inches/turn
muzzle velocity 1300 fps
Temperature 50 degrees Fahrenheit (59 is standard)
Pressure 29.92 inches of mercury (29.92 is standard)

Sg = 2.29

[ChrisF]

It is a 34" heavy barrel with a 1:18 twist

[SFogler]

SchuetzenDave,

Would please calculate this:
What would it be with 1250 fps, 540 grain bullet that's 1.453 long in a 20:1 twist? 45-100 Axtell
And 1300 fps 560 grain bullet that's 1.51 with I think a 18:1 twist. (mid 1990's Shiloh 45-110)

Thanks,
SFogler

[SchuetzenDave]

Caliber 0.458 Inches
Bullet Weight 540 Grains
Bullet Length 1.453 Inches
Barrel Twist 20 Inches/turn
muzzle velocity 1250 fps
Temperature 50 degrees Fahrenheit (59 is standard)
Pressure 29.92 inches of mercury (29.92 is standard)

Sg = 1.89

Caliber 0.458 Inches
Bullet Weight 560 Grains
Bullet Length 1.51 Inches
Barrel Twist 18 Inches/turn
muzzle velocity 1300 fps
Temperature 50 degrees Fahrenheit (59 is standard)
Pressure 29.92 inches of mercury (29.92 is standard)

Sg = 2.20

[CBarnard]

Please can someone explain - what is a money bullet, where does the term come from? I have some pp cast money bullets on order to try in my new Quigley 45-90 when it arrives here in the UK, its at the export agent now ready to ship . I have seen money used many times but have never thought about it until now. I am ok for gg bullets, I have a few good moulds but thought I might at least just try pp to see if they work.
Thanks

[firefighter1990]

If my history is correct, the "money bullet" was the product of Dan Theodore and Doc Lay in their search for a good long-range bullet profile. After testing various design profiles, they concluded on what was historically identical to what is known as the "medford" bullet.

As far as the naming of "money bullet"; I've heard two different theories. One is that the bullet shot so well that it "shot on the money" or some kind of street talk like "that bullet is money." The second is that Doc's personal rifle was nicknamed his "money rifle" making his bullet the "money bullet." I never looked into it further as it sounds like a never ending rabbit hole.

I shoot a .443" by 1.49" long paper patch "money" in 3 of my rifles. All have standard grease groove chambers and I'm happy with that bullets performance. Not a hunting bullet but as far as target shooting goes it's one of the best. An elliptical has better ballistics yet but it was a finicky profile in my testing. It was more dependant on casting alloy and wind conditions than was the medford-money. Subsonic flight characteristics are way different than that of super sonic and therefore a certain drag model reaches the apex of the performance curve and supposedly Dan Theodore and Doc Lay settled on the medford for that same reason.

[ChrisF]

Dave what math formula is that

[firefighter1990]

http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi

[ChrisF]

Thanks

[SchuetzenDave]

Yes it is the Don Miller Gyroscopic Stability Factor Calculator as discussed in this Precision Shooting article:

http://www.jbmballistics.com/ballistics ... lity_2.pdf

[CBarnard]

firefighter, thanks for your thoughts on the money meaning. I can't wait to try them out once I take possession of my new rifle.
Cheers,
Chris