Just ordered the reamer for a .411 hawkish round I've wanted to try. The concept is 280 Rem. case with a .330 neck length 40 degree shoulder, 2.480" case length, 2.150" to start of neck, shoulder dia of .459", Neck dia. of .442", using .416 dia bullets instead of .410. Going to rebarrel a Husqvarna w/26" barrel to start then shorten if it doesN't feel right. Any thoughts?

Been there done that got the T-shirt. I took my 280PDK case and necked it up to 416. My case was a 280 Rem with .28" neck (when 7mm don't have the exact length in 416) Shoulder was .458 40 deg neck. Ended up with about 4-5 grains more gross capacity than the Hawke. My buddy has it on loan(for 8 years now) still using it in Alaska.

While you can take the 280 brass up in stages. Get 06 cylinder brass or AHR brass. Save a step or two. If possible use a longer action 3.6" sure is better than 3.4". With that size case and bore 2" of barrel will not give you more than 10-15FPS. The 24 or 22" would be better in my opinion.

I have some load data if I haven't lost it.

Just went and measured my case. After forming the 280 case shortened to 2.47" With that case length my neck is .26. My case designed called for a 2.5 case length. So design neck length would be .29". If that makes sense. That is why the cylinder or AHR brass is a better deal it starts as 3.6" before forming.

the 9,3x62 or 9,3x66 brass will give you a better shoulder...

https://forums.accuratereloading.com/eve/forums/a/tpc/f/...=867108245#867108245

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the 9,3x62 or 9,3x66 brass will give you a better shoulder

The 62 brass is shorter than the 280. The 9.3x66 would work but it is not available and has to be made normally from cylinder brass anyway.

Ramrod, would appreciate any load data you might have. The main reason for the 280 brass is I have 1,000 cases. The 9.3 might hold a little more powder but I've been around enough to not need to quibble about 75fps. If the case works out ok, if not I will run something larger in, isn't that what catting is about? Don't really need a case that is a pain to come by or is a royal pain to shape, would rather shoot than form cases. Lynn

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The 9.3 might hold a little more powder but I've been around enough to not need to quibble about 75fps

The 62 case would hold less the 66 since it is 3.6" long would hold more gross. It will not have any higher net capacity than the 280 brass. I took mine up in three stages. To 338 then 375 then 416. I bought several expanders and ground my own taper.

I will look for that loading data first of the week. Heading for the lease in the morning.

I will appreciate any data, so thanks Ramrod. I have two Hornady dies with their tapered expanders one in 35cal next to 375 then over a tapered 416, case shortens and after truing end up just shy of my max oal. Will fireform with the 350gr RCBS cast bullet. Will probably shoot 350 Speer magtips and 300gr Hawks with the thinner jackets. Figure I don't have enough case capacity for heavier bullets.

Lynn ,,it sounds like a fun , useful project .. PLEASE post the ballistic data results from the chronograph and load data....The CZ 550 Medium has a longer magizine box than standard..... Gumboot out.

As I shoot both fireform and work up loads, I will post the results. I am a fan of the Husqvarna as it makes up into a lighter rifle. The mag length is no problem as I modify stock mags for longer oal. I will have to wait till the barrel is chambered to see just what the best oal is. I leave some of the design to Dave at PTG as he has way more knowledge than me. Lynn

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Originally posted by ramrod340:

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the 9,3x62 or 9,3x66 brass will give you a better shoulder

The 62 brass is shorter than the 280. The 9.3x66 would work but it is not available and has to be made normally from cylinder brass anyway.

www.z-hat.com sells the brass. i would expand, trim at prefered length fireform and viola!

http://www.z-hat.com/images/9.3x66%20drawing.pdf

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www.z-hat.com sells the brass. i would expand, trim at prefered length fireform and viola!

Didn't know they had the headstamp. Thanks for that info. Curious what 66 brass gains over cylinder brass for his purpose?

Here is the load data I have here. Like I said my buddy has had the rifle for 8 years. I don't have any of his work.

416PDK Load data.

Case length 2.47" My chamber is set for 2.5" case but net volume would not be higher since the bullet would just fill the neck
Volume 82.2gr water
OAL 3.4"

Powders tried H335, 4320 and IMR4895.
4895 gave best results and choosen as standard
All loads are IMR 4895

Bullet Charge Velocity
350Speer 68 2400
67 2385 Most Accurate
66 2365
65 2350

300 Hawk 70 2570 Accurate
69 2555
68 2525

400Hawk 67 2205
66 2190
65 2160 Accurate

We found the 400PT too long used up to much case.