300 Hulk
- Thread starter jeepcj6
- Start date
Good question, Roger. Too bad Tom doesn't post here. I asked him some questions about the HULK case on Benchrest Central a couple of years ago. Maybe he still posts over there. But I think it is just a way to make a more efficient cartridge for the bullets he wants to shoot. I did play around with some of those big 30 cal cases in QuickDesign and QuickLoad and you get to a point of diminishing returns with extra powder pretty fast when you move beyond the capacity of a WSM. A lot of people, such as Matt Kline, are winning and setting records with a 300 WSM using much less powder; and one of my F-Class friends set a national record with a 300 RSAUM which is even smaller than the WSM.expiper said:
Hey Expiper
If your shooting something like a 300 Weatherby improved the first thing you run across it loose primer pockets with a few reloadings.You also really don't need more than a 100 grains of water capacity to run some fast velocities in a 30 caliber slinging heavy lead.
With the 338 Lapua as a parent case you get extra tough brass and more case diameter.This allows you to create the short and fat is where its at case while giving you great brass life and no loose primer pockets.
If you pushed the shoulder back to 300 WSM length you could get tougher brass a longer neck and a little more capacity due to the extra case diameter plus some extra velocity.
Lynn
If your shooting something like a 300 Weatherby improved the first thing you run across it loose primer pockets with a few reloadings.You also really don't need more than a 100 grains of water capacity to run some fast velocities in a 30 caliber slinging heavy lead.
With the 338 Lapua as a parent case you get extra tough brass and more case diameter.This allows you to create the short and fat is where its at case while giving you great brass life and no loose primer pockets.
If you pushed the shoulder back to 300 WSM length you could get tougher brass a longer neck and a little more capacity due to the extra case diameter plus some extra velocity.
Lynn
JeepCj6,
I can't give you anything about the Hulk but I am working on something very similar. I couldn't find much information about the 300 Hulk and some of the threads looked like he wanted to keep it that way so I made what I call a 300 Slam (Short Lapua Magnum). Here is the cartridge with a 240 SMK and a 225 Hornady.
Intent was to push the heavy bullets at about 3000 fps but not have to use extremely slow powders to do it. The fireformed case holds a total of 105 grains of water and 97.5 to the neck junction, which is about 6 more than a 300 Weatherby. Like Lynn said my 300 Weatherby cases wouldn't last, and I'm thinking these will. This case weighs 70 grains more.
I tested a rechambered 10 twist 25.5 inch fireform barrel with 210 Bergers at Match 1 at Williamsport because they were what I had sorted and I ran out of time, since Hornady missed the date and I had to make my own dies. I still haven't received anything. They said 12 weeks, I called, they said 2 more weeks, tomorrow it will be 4 weeks...
Anyway with the fireform barrel and 210 Bergers I was getting 3180 before any sign of ejector marks started. I quit at 3250.
I now have a 31 inch 10 twist Broughton on it and just yesterday I checked for max load with 240 SMK and 225 Hornady. 240 SMK showed a very slight ejector mark at 2975 with H1000 but reached 3025 with Retumbo and still no signs. The 225 never showed a sign and I ran both powders up to 3100.
This week I'll let you know if a 240 in a 10 twist at about 2950 works at 1100.
Here is a pic of my homemade die case progression.
Shummy
I can't give you anything about the Hulk but I am working on something very similar. I couldn't find much information about the 300 Hulk and some of the threads looked like he wanted to keep it that way so I made what I call a 300 Slam (Short Lapua Magnum). Here is the cartridge with a 240 SMK and a 225 Hornady.
Intent was to push the heavy bullets at about 3000 fps but not have to use extremely slow powders to do it. The fireformed case holds a total of 105 grains of water and 97.5 to the neck junction, which is about 6 more than a 300 Weatherby. Like Lynn said my 300 Weatherby cases wouldn't last, and I'm thinking these will. This case weighs 70 grains more.
I tested a rechambered 10 twist 25.5 inch fireform barrel with 210 Bergers at Match 1 at Williamsport because they were what I had sorted and I ran out of time, since Hornady missed the date and I had to make my own dies. I still haven't received anything. They said 12 weeks, I called, they said 2 more weeks, tomorrow it will be 4 weeks...
Anyway with the fireform barrel and 210 Bergers I was getting 3180 before any sign of ejector marks started. I quit at 3250.
I now have a 31 inch 10 twist Broughton on it and just yesterday I checked for max load with 240 SMK and 225 Hornady. 240 SMK showed a very slight ejector mark at 2975 with H1000 but reached 3025 with Retumbo and still no signs. The 225 never showed a sign and I ran both powders up to 3100.
This week I'll let you know if a 240 in a 10 twist at about 2950 works at 1100.
Here is a pic of my homemade die case progression.
Shummy
Good pic Shummy,,,worth a 1000 words....is that a 30* shoulder???,.,,,,and hav u tried Rx-25,,,it is a good powder in the 300 mags based on the old H&H case....and what action are you using for that massive case.....plelase keep us informed on how it goes.....you have done a bunch-0-work....OBTW,,,did you make your own sresize die etc....good to find somone who is willing to share info...Roger
Hi Roger,
It's a mix of alot of things I read about. It's a 35 shoulder like the WSM, has a 300 Rum body taper, the neck length came from a formula I found that theorizes why 6 PPC's and 300 WSM's are accurate. The water capacity slightly over an improved 300 Wby and the throat to set a 240 at the neck junction. Although there are no worries of a doughnut here because it has to get reamed out before you can seat a bullet.
338 straight taper neck, loaded round 335.
I used a RCBS 338 Lapua die with the base ground off for the first pass, a RCBS 30-378 die with the base ground off for the next pass (had to slightly hone the base of the die), cut off the neck with a homemade dremel tool table saw, honed down the Forester trimmer pilot to accept the fat necks and trimmed, annealed, fireformed with 20gr unique and cream of wheat, reamed with a custom Forster .309 reamer,and outside turned. My gunsmith ran the reamer in a set of Redding competition seater and neck size die inserts (formerly 300 Wby). Ran the reamer into a Wilson 338 Lapua case holder and finish trimmed the brass.
I do lack a full length / body die, once I get three cases fired 3 times, I am going to contact Neil Jones for that.
When I eventually get the Hornady dies, I am going to set them on the shelf with a big sign that says, "Although these were the price of two barrels, smile, there was a valuable lesson learned here.". They do make danged good bullets though.
The action is a Weatherby Mark V.
Shummy
It's a mix of alot of things I read about. It's a 35 shoulder like the WSM, has a 300 Rum body taper, the neck length came from a formula I found that theorizes why 6 PPC's and 300 WSM's are accurate. The water capacity slightly over an improved 300 Wby and the throat to set a 240 at the neck junction. Although there are no worries of a doughnut here because it has to get reamed out before you can seat a bullet.
338 straight taper neck, loaded round 335.
I used a RCBS 338 Lapua die with the base ground off for the first pass, a RCBS 30-378 die with the base ground off for the next pass (had to slightly hone the base of the die), cut off the neck with a homemade dremel tool table saw, honed down the Forester trimmer pilot to accept the fat necks and trimmed, annealed, fireformed with 20gr unique and cream of wheat, reamed with a custom Forster .309 reamer,and outside turned. My gunsmith ran the reamer in a set of Redding competition seater and neck size die inserts (formerly 300 Wby). Ran the reamer into a Wilson 338 Lapua case holder and finish trimmed the brass.
I do lack a full length / body die, once I get three cases fired 3 times, I am going to contact Neil Jones for that.
When I eventually get the Hornady dies, I am going to set them on the shelf with a big sign that says, "Although these were the price of two barrels, smile, there was a valuable lesson learned here.". They do make danged good bullets though.
The action is a Weatherby Mark V.
Shummy
G-morning Shummy...wow...you have literally built that ctg....very ingenuius...I am used to having to "make" everything here too,,,most folks cry if they cant figure out the correct seting depth ...hahahah.......I hope it shoots as good as the design looks....it is refreshing to see somone who can chop and whittle when what he needs is not down at the local gun shop....I am anxious to see what the targets look like....try jumping those Hornaday bullets ...they are excellent....Roger
Hey Roger,
Going to give it a go tomorrow, will see what happens.
Hi Lynn,
I went through PTG, print #33893 300 Short Lapua Mag 35*. I would imagine you could have them make one. I know I referenced alot of other people's work in making it.
Down the road though I am thinking I may either shorten the case gage retaining the same body taper, or decrease the base dimension just until the fired dimension of the casehead seamlessly transitions into the thinner side walls.
While my base dimension of .5885 is considerably less than CIP of .5917, the thick casehead walls at the thick-thin transition point retains their shape and leaves a slight bulge in the transition region. Perhaps without an ejector and a bushed firing pin I could get them out there but for now I'll live with the slight bulge.
The Hornady dies are a backlog issue, I was told this week that some people are waiting on dies ordered last November, so I guess we are all in the same boat. It just appeared that since I called and inquired at 12 weeks 3 days, that I got shifted to the end of the pile. Since at that time I was told two more weeks, 4 weeks + ago.
Going to give it a go tomorrow, will see what happens.
Hi Lynn,
I went through PTG, print #33893 300 Short Lapua Mag 35*. I would imagine you could have them make one. I know I referenced alot of other people's work in making it.
Down the road though I am thinking I may either shorten the case gage retaining the same body taper, or decrease the base dimension just until the fired dimension of the casehead seamlessly transitions into the thinner side walls.
While my base dimension of .5885 is considerably less than CIP of .5917, the thick casehead walls at the thick-thin transition point retains their shape and leaves a slight bulge in the transition region. Perhaps without an ejector and a bushed firing pin I could get them out there but for now I'll live with the slight bulge.
The Hornady dies are a backlog issue, I was told this week that some people are waiting on dies ordered last November, so I guess we are all in the same boat. It just appeared that since I called and inquired at 12 weeks 3 days, that I got shifted to the end of the pile. Since at that time I was told two more weeks, 4 weeks + ago.
JRS said:Wouldn't it have been simpler to use the 300 Norma Magnum
JRS, you make a valid point, but consider this...
Schummy obviously spent a lot of time figuring this thing out. You don't put that much effort into something unless you enjoy doing it, which he obviously does. Anyone can go buy the stuff for the Norma Mag, but to design and build a cartridge on your own is a rewarding experience, especially if it shoots well! designing wildcat cartridges is not for everybody, including myself, but the ideas that are conceived, planned, and completed by people like Shummy benefit all of us. You never know, this could be the next "must-have tac-driving cartridge" in the big 30 cal class...
Yeah it probably would have, if there are commercial dies available for it, in an AI config, with Lapua brass available for it.JRS said:Wouldn't it have been simpler to use the 300 Norma Magnum
Some good news and better news. At four times fired the slight bulge has diminished considerably. I figure shortening it .1 would get rid of it, but then it would have exactly the same capacity as a 300 Wby and what fun would that be.
Better news is I got lot's more load and range work to do because I got my butt handed to me Saturday. Looks promising though, the first 9 had 3.5 inches vertical, but the 10th went a foot low.
Shummy
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