Project 300 ack. mag.

baltz526 · Nov 19, 2014

I'm nearly certain the barrel is a Pacnor Custom Match. It was Bead blasted Finish, But I have begun To polish The Stainless Barrel. Barrel had Some marring to bead blast finish So I'll just Live with it as Polished Stainless. Rifle had been hunted hard put up wet. Shot little. I'll fireform a few brass in the next few days. And Proof test it with a Generic off brand Factory 300 weatherby load. If the 300 weatherby ammo shows no pressure sign I'll shoot a group.

baltz526 · Nov 19, 2014

The case is Basically just a 300 weatherby mag with the shoulder changed. The Only Pressure problem Should be from the fact Freebore is Not cut as the Standard Weatherby has. This ammo has a standard jump to rifling Found on standard non weatherby ammo. Very much like Match ammo I have measured in past. .015" + -

baltz526 · Nov 22, 2014

BALLISTICS CALCULATOR

Description: 300 ackley magnum Zero Range: 333 yd
Bullet Style: Nosler Ballistic tip Temperature: 59 °F
Bullet Weight: 168 gr Wind Speed: 10 mph
Ballistic Coeffcient: 0.49 Altitude: 5000 feet
Muzzle Velocity: 3400 fps Max Range: 500 yd
Sight Height: 1.5 in

Range (yd) Drop (in) Wind Drift (in) Velocity (fps) Energy (ft-lb)
0 -1.5 0.0 3400 4312
50 1.2 0.1 3310 4087
100 3.0 0.5 3222 3873
150 4.1 1.0 3136 3668
200 4.2 1.8 3052 3473
250 3.5 2.8 2969 3287
300 1.7 4.0 2887 3110
350 -1.1 5.5 2808 2940
400 -5.0 7.3 2729 2779
450 -10.1 9.4 2652 2624
500 -16.4 11.7 2577 2477

baltz526 · Nov 22, 2014

MPBR 400yrds on Elk is What I'm looking at from some Research on Load Data + - 5". Also the 168gr is looking better than a 180gr or 200gr for range and Energy as far as I'm willing to shoot. I hope to shoot it Tomorrow

baltz526 · Nov 22, 2014

BALLISTICS CALCULATOR

Description: 300 Ackley Magnum Zero Range: 340 yd
Bullet Style: Ballistic Tip Temperature: 59 °F
Bullet Weight: 168 gr Wind Speed: 10 mph
Ballistic Coeffcient: 0.49 Altitude: 5000 feet
Muzzle Velocity: 3400 fps Max Range: 800 yd
Sight Height: 1.5 in

Range (yd) Drop (in) Wind Drift (in) Velocity (fps) Energy (ft-lb)
0 -1.5 0.0 3400 4312
50 1.2 0.1 3310 4087
100 3.2 0.5 3222 3873
150 4.3 1.0 3136 3668
200 4.5 1.8 3052 3473
250 3.8 2.8 2969 3287
300 2.1 4.0 2887 3110
350 -0.6 5.5 2808 2940
400 -4.5 7.3 2729 2779
450 -9.5 9.4 2652 2624
500 -15.8 11.7 2577 2477
550 -23.3 14.3 2502 2336
600 -32.1 17.2 2429 2201
650 -42.5 20.4 2357 2073
700 -54.5 24.1 2287 1950
750 -68.3 28.1 2217 1833
800 -83.7 32.5 2149 1722

baltz526 · Nov 22, 2014

With a 340yrd Zero It looks pretty good. +4.5" 200yrds to -4.5" 400yrds, -16" 500yrds, -24" 550yrds, and -32" 600yrds -- Now if I can Actually get the projected 3400fps and Range shooting matches.

SJB358 · Nov 23, 2014

Looks deadly to me. With the right 165/168 that baby will carry the mail!

baltz526 · Nov 23, 2014

Shot it and Fireformed a couple cases. Case Completely full of water holds 100gr. Max Powder capacity with IMR7828 to base of neck, 91gr. With H1000 to base of neck, 94gr.

baltz526 · Dec 16, 2014

An Interesting Ballistic chart

Description: 300 ackley Zero Range: 320 yd
Bullet Style: Sierra Match Temperature: 59 °F
Bullet Weight: 190 gr Wind Speed: 10 mph
Ballistic Coeffcient: 0.575 Altitude: 5000 feet
Muzzle Velocity: 3150 fps Max Range: 800 yd
Sight Height: 1.5 in

Range (yd) Drop (in) Wind Drift (in) Velocity (fps) Energy (ft-lb)
0 -1.5 0.0 3150 4186
50 1.4 0.1 3078 3996
100 3.4 0.4 3007 3813
150 4.4 0.8 2937 3638
200 4.4 1.5 2868 3469
250 3.4 2.5 2800 3307
300 1.2 3.7 2733 3152
350 -2.1 5.1 2668 3002
400 -6.7 6.8 2603 2858
450 -12.5 8.6 2539 2720
500 -19.6 10.8 2476 2587
550 -28.1 13.1 2414 2458
600 -38.2 15.8 2353 2335
650 -49.9 18.8 2293 2217
700 -63.2 22.2 2233 2104
750 -78.4 25.8 2175 1995
800 -95.3 29.8 2117 1891

SJB358 · Dec 16, 2014

That's some serious HP!

baltz526 · Jan 4, 2015

Using new Fire formed Brass and the H1000 Starting load for the 165gr Ballistic tip 84gr. I got 3170fps and a very accurate load. With New Weatherby brass and the Take down powder that came in the Cheap Weatherby ammo I bought (79gr IMR4831 Best guess), with a 165gr Ballistic tip. I got 3181fps. Which ran right above the Nosler 300 Weatherby Max load IMR4831 79gr data, 3158fps. With no pressure signs.

IdahoCTD · Jan 4, 2015

I use to shoot 165's 3350fps in my 308 Baer with 83grs of 7828 so I know you've got room to go up if you wish. If the accuracy is there it's hard to screw with things sometimes though.

baltz526 · Jan 5, 2015

I Was getting ready to call Huntingtons for the Die set today. Phone rang and I got to spend the day digging up a Septic tank to be Pumped, Then Rebury it. Maybe later this week. It only cost me $200 to work all day.

NWBlacktail · Jan 5, 2015

Who wouldn't want to spend the day digging up a septic tank?

I'm enjoying how your project is coming along. :mrgreen:

baltz526 · Jan 15, 2015

Lyman 300 Weatherby Die set came today. Ran a 300 Ackley Fireformed case through it, Adjusted to Not bump the Shoulder. Body of case Sized Down and Neck sized Just fine. How many firings I'll get before I need to bump the Shoulder ? Time will Tell. But the Standard 300 Weatherby Dies are going to work for now. I'll Start Fine tuning a Load soon. Scope is the last Thing on the Rifle Revival build list.

SJB358 · Jan 15, 2015

Very nice. It has been a cool project. That's a serious hunting cartridge. I'm becoming a little enamored of that big WBY case. Being an Ackley just makes it cooler!