Finally got the results completed on some 400gr loads for my 400PDK. This case is made from 06 Cylinder brass minimum taper. 86grs of water capacity. The bullets were 416cal bulk 400gr bullets I had picked up at a gunshow. They look to me to be Hornady but I'm not sure. I ran them through a lee 410 sizer twice. Final dia was just under .411. With the bullet seated in the cannelure the OAL was 3.425" So I had to seat the bullet deeper 3.38". I didn't really test multi feeding function. If I was going to shoot these bullets all the time I would need to take a file to the front and back of the mag box and maybe shorten my cases(2.65") a little.

I used three different powders. Varget, IMR 4895 and RL15. I set upper limits at what I calculated to be around 104% volume capacity. Then watched for pressure indications. In all three cases there were no pressure signs given. I will give the range I used. If someone really wants the increments between PM me.

IMR 4895
63grs 2144FPS
69grs 2239FPS

RL15
63grs 2165FPS
70grs 2312FPS

Varget
63Grs 2201FPS
70grs 2321FPS

These velocties compare very well with 450/400 400grs. I no longer have pressure equipment but Loadteach and Quickload show top pressures in the 60,000 range. As I said there were not signs of pressure on the cases or extraction.

Well darn Paul, that will just work!

Simply... AWESOME!

Thats 404 Jeffery ballistics there!

How bout some 300 grain spitzers like these for non DG loads

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How bout some 300 grain spitzers like these for non DG loads

Boom, I had posted this for 300 gr flat point. I would think the velodity for a 300 spitzer would be real darn close. These are VArget and a Hornady 300 Flat point.

Powder Charge Velocity
63 2525
64 2550
65 2565
66 2580
67 NR
68 2625
69 2643
70 2662
71 2675
72 2690
73 2719
74 2730
75 2744

Next test will be 350gr Spitzers.

WOW!

Well the 300 grain barnes will hold together at those speeds.

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Well the 300 grain barnes will hold together at those speeds

LOL Like you I have some concerns about the 300gr Hornady holding together at that speed. Since it was designed for the 405Win. But with it's low BC it will shed velocity pretty quickly. After I get the velocity for the 350s I'm going back to the 300s for an accurate load. Then I plan to try it on a large hog down at the lease and see how it performs. Maybe like a 300gr varmint bullet.

Well with North Fork on the rise you will have some good options.

I would love to see the results on the 200 grain pistol bullets...can we break 3000 fps?!?!?!?!?!?

410 grain Speer gold dots and 180 barnes xpb's would be the best candidates for holding together. Maybe make the barnes a partition by pouring lead in its cavity. maybe even cast a spitzer tip for it Now THAT would be cool

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I would love to see the results on the 200 grain pistol bullets...can we break 3000 fps

So far the only pistol bullets I tried were with 4227. Around 2300FPS didn't get enough pressure to form the shoulder. Z-Hat lists 2900+ with 4895 and a 210 in his 411Hawk. Software shows 3000+ fps with 60,000 and 4895 in my case. Couple other powders also calculate to clear 3000 but in all cases it is around 60,000psi. All loads appear pressure limited not capacity.

The 350's @ 2,500 should be a great all rounder.

Ramrod , what case are you useing , and what is the barrel length ????????? Those are Taylor ballistics ....

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Ramrod , what case are you useing , and what is the barrel length ????????? Those are Taylor ballistics

The cases are 06 cylinder brass purchased from Z-Hat. They are Remington and the head stamp says 35 Whelen and are 2.65" in length. The barrel is a 24" Douglas. Throat is set to allow a 400gr bullet to be set in the cannelure and have clearance. As I stated in the cannelure a 400gr OAL would be 3.425" but I have to set them deeper to clear the magazine. So the bullet gets a good jump.

My data shows the capacity of a 416 Taylor as around 93grs of water. I'm at 86. Taylor OAL is 3.34" I'm loading longer than that. So on a net capacity basis I'm closing some of that gap. My powder charges are very close to the Taylor. Except in my case they are compressed in the Taylor they are not.

As I've stated I no longer have access to pressure equipment. So I can only check cases and measure for expansion. So even with software calling pressures in the 60,000 range I could very well be higher. Heck an extra 5000psi could be 50-75fps. I have also only shot over my Beta Chrony. While it as always given me velocity in the range I expected it could also be high. I hope to fire over my buddies in the near future for a second data point. Comparing data for the 411 to some old data I had from the 416 Version I built years ago 67 grs of 4895 gave me 2205FPS with a 400Hawk. The 416 version used a blown out 280 case and was shot over a different Chrono.

Bottomline, don't go running out and selling your Taylor. What I have is one rifle, one run of cases, one specific barrel shot over one Chrony giving me these results. A very limited data source to say the least. Since I have the only reamer the market will not be flooded with 400PDKs.

My case will not do anything a 416 Taylor can't do easier. I do get to load 4 down vs 3. One last negative a 416 Taylor built on a normal magnum action will normally feed fine. Toomanytools had a heck of a time to get proper feeding with 300gr flat nose bullets from my MKX action.

If anyone feels they really need one then contact Z-hat. He has a reamer called the 411 Express. It is his 411Hawk stretched .23" to take full advantage of the 2.65" case. Capacity would probably be a little greater than mine.

This is all amazing, Paul!
It gives me great hope for my .425 Fossdal!!
But for the world, however do you squeese 75 grs of powder into this case?
And 70 grs with a 400 grs bullet and col of 3.38?

Oh, and we really want pics of this baby!!

quote:

Oh, and we really want pics of this baby

If you mean the rifle it is as ugly as homemade sin right now. Sitting in a Hogue stock. With the nice piece of bastogne sitting on the work bench.

I PM'd you details but the 400gr bullets (unknown brand) are short design. At 3.38" the load would be around 105% with the 300 load the compression was around 102.8%. Looks like accuracy loads for the 300 will be around 70gr and 2660FPS still need to play with them as well as try some other 330gr bullets. Above 71 the loads just opened up.

quote:

Originally posted by ramrod340:

quote:

Oh, and we really want pics of this baby

If you mean the rifle it is as ugly as homemade sin right now.

Naa...
The cartridge, man! The cartridge! Next to, say a .35 Whelen or some known cartridge.

quote:

Naa...
The cartridge, man! The cartridge! Next to, say a .35 Whelen or some known cartridge.

OK Bent you asked for it.

As you go left to right they are. 338-06, 400PDK with 300gr set to 3.25", a 375 Whelen, 400PDK with a 400 set to 3.38" and last the 375H&H.

Now to error of the side of way to much information. Again left to right. The cartridge that stated it all for me the 280PDK. Followed by a 338-06, 340PDK, 375 Whelen, 380PDK, 400PDK, 400PDK and 375H&H.

Until the 400PDK I has always used Norma 280 brass. Since I was magazine limited a longer case did not gain me net capacity with 375 and lower calibers. When I went to the 400 300gr bullet cylinder brass was not only far easier to use but the longer case allowed me to move the bullet forward still stay in the cannelure and increase net capacity.

Awsome, Paul!!
Thanks!!