Guys:

Sorry it has taken me awile to respond, Thanksgiving Holiday, and a great decoy Canada goose hunt, keep you away from the computer. LOL!

My particular rifle is a 28" 1 in 10 Sendero Countour, on a 700 Remington.

I think the bullets I would like to shoot are in the 85 to 100 grain range, I built this rifle as a long range varmint/chuck gun.

I appreciate any of your recommendations, and I will try them all, till I find the most accurate load.

Thanks


Jerry

I had one based on a Win M70. Took a 24 inch
243 barrel and rechambered it. Shot several
coyotes with 85 gr cheap soft points and saw
pretty spectacular results. Got tired of putting so much powder in the case for very
little gain in velocity and sold it. I hope that you enjoy yours.

Jerry - I would like to hear what velocities you can get. I once had an early model Ruger#1 6mm with 26" bbl that could get 3300 fps with the 105g Speer and 3400 fps with the 95g Nos Part. I thought that was exceptionally fast for a 6mm. I have shot 243's with 22" bbls that can barely reach 3000 fps with 100g bullets. Velocity loss from 26" to 22" bbls must be very significant in 243 cal !!!!!.....LR

I once strolled down wildcat lane and built a .243 superrockchucker....I saw the data from Huntington and was duly impressed so bought the barrel and fitted it to the Winchester action and stocked it.....It actually shot quite accurately and I used it on prairie dogs successfully.
The problem was that I was never able to reach the performance stated by Huntington and it wound up as a glorified .243 Winchester besting it's performance by no more than 150'/sec. Oh yea.....and I have these expensive dies to boot!!!

There's a lot of BS in the firearms business and no where is there more than in the wildcat arena.....and especially when the terminology used includes the words "Ackley" and "Improved".

Maybe I should have built a .243 superrockchuckerackleyimproved!!!

vapodog - I could not agree more. In 1992, I built a 25 Gibbs with 26" bbl that turned out to be a disappointment. I could only beat my 25-06 with 24" bbl by about 100 fps. I enjoy the AI's and have several and agree that the improvement is usally academic with the exception of the 250 Sav AI. I believe the 250 Sav AI realizes more velocity gain than any other AI. I have one and really like it.....LR

Vapodog-do you still have the dies for the super rockchucker? How much do you want for them. I have some unknown version of a 6mm-06 improved and I think I could modify the dies to to fit my cases which are longer from base to shoulder and in shoulder diameter. course I could be biting off more than I can chew too!

quote:

Originally posted by vapodog:
I once strolled down wildcat lane and built a .243 superrockchucker....I saw the data from Huntington and was duly impressed so bought the barrel and fitted it to the Winchester action and stocked it.....It actually shot quite accurately and I used it on prairie dogs successfully.
The problem was that I was never able to reach the performance stated by Huntington and it wound up as a glorified .243 Winchester besting it's performance by no more than 150'/sec. Oh yea.....and I have these expensive dies to boot!!!

There's a lot of BS in the firearms business and no where is there more than in the wildcat arena.....and especially when the terminology used includes the words "Ackley" and "Improved".

Maybe I should have built a .243 superrockchuckerackleyimproved!!!

oakrch708:

Sorry it took a month to get back to your question, but here are some bullet weights and their respective velocities.
57.5/4350/55 Ballistic tip 4032 fps
47/4064/70Ballistic tip 3705fps
52/RL22/100 Speer SP 3297fps
54/RL22/95 Ballistic tip 3470 fps
54/IMR7828/95 Ballistic tip 3536 fps
53.5/IMR4831/87 HNDY HP 3620 fps
53.5/IMR4831/85 Sierrra HP 3537 fps
54/IMR7828/105 A-Max 3391fps/Es8.6
53.5/7828/105 A-Max 3346 fps/0 es
54/RL22/105-A-Max 3408fps

This is info I have compiled so far. None of these loads show any pressure in my rifle, and I am sure there is more velocity to go.

I tried the 105's at longer ranges and they would not stabilize in my 1/10 barrel. They did however shoot groups in the 4's at 100 yds.

The 85 Sierras and the 87 Hornadys group well and I an going to try and push them up above 36 or 3700 and see what happens.

Jerry

Jerry:
Thanks for posting your velocities. Sounds like you got a nice rifle. An 87g bullet moving at 3600 - 3700 fps sure will make a nice coyote rifle !!! Good Hunting !!!

My concern with wildcats is not the cost of chambering reworking brass, load development, etc

But the cost of dies.

Takeoff barrels in the proper bore sizes are plentiful
and chambering reamers reasonable.

But I take offense at paying over $100 for a two die
set and still needing a neck sizer....

I'm actually considering (again) a 240Gibbs because I found a New, Old Stock (made in 1971!) RCBS FL set at a dealer
for $35

AllanD

i shoota 240 Gibbs, built on a Win 70, great cartrdge, i really like it. - dan

Hi all you 6mm-06 folks. Finally got to do some shooting with my version of a 6mm-06. I took the time to chrono some of my beginning loads made from fireformed .270 PMC brass.

56gr H414 70 grain speer = 3811 fps
56gr H414 75 grain MBR = 3733

finally won one round at our local shoot with load 2, but still haven't found the most accurate load yet.

Robert:

Nice to hear from you, and thanks for the reply.

I have been using 54 grains of IMR4831 and a Hornady 87 HPBT, for about 3675 to 3700 fps, with great results on Prairie dogs.Groups in the high 3's and 4's.

Lets hear some more about what your up to!

Jerry

Hi Jerry,

My version of the 6mm-06 is a "one of" as the RCBS folks put it when I enquired about dies for the rifle. So this is a work in progress. The closest dimensions are just shy of the 240 gibbs.

My initial fireforming load on virgin 270 brass with a 95 gr Nosler BT and 53 grains of RL25 went 3195 fps. Same load in fireformed went 2995 fps. Initial goup size was .705 outside spread.

Can anyone part with a 6-06 shell ? STD or IMP or both...

Jerry,

My latest experiment with this rifle was 61.1 grs RL25 w/ 75 gr bullet and CCI BR2 primers. Pressure was very mild. load went 3334 fps through the chrono. Haven't tested it for accuracy yet. RL25 seems to be to slow with this bullet in my cartridge. I was looking for a load that would fill my case to the junction of the neck and shoulder ergo the 61.1 grains of RL25. Now I'm planning on going up to 85-87 grain bullets

quote:

Originally posted by Jerry Eden:
Robert:

Nice to hear from you, and thanks for the reply.

I have been using 54 grains of IMR4831 and a Hornady 87 HPBT, for about 3675 to 3700 fps, with great results on Prairie dogs.Groups in the high 3's and 4's.

Lets hear some more about what your up to!

Jerry

Yup short44. I have acquired some .243 super rockchucker and I can send you one of my one of cases.

quote:

Originally posted by short44:
Can anyone part with a 6-06 shell ? STD or IMP or both...

Robert:

I also had good luck with RL22, and the 85 to 90 grain bullets. I decided to stay with IMR4831 as I already had 8lbs, and the velocities and groups were the same if not better. I have found, at least in my 28" 1in10 barrel, that the bullets above 75 grains gave better performance.

Short 44:

The way I formed my first 6mm-06 cases were: take a standard 30-06, I then ran it thru a 270 die, and then a 243 Winchester die to form the neck. If you have any combination of the above dies you can easily form one. If not we''ll send you one.


Jerry

Hi Jerry,

decided to try IMR4831. 75 gr. MBR bullet-fireformed .270 pmc brass-CCI BR2 primers and 61.6 grs IMR 4831. The outside temp when I tested this load was 75 degrees. result was 4,067 fps @ 15 feet. I would consider this load to be maximum in my case/rifle. Next shoot this wednesday I'll be testing this load for grouping. I am also going to be trying out some 55-60 gr loads on top of this powder charge.

I also tried the 61.1 grs RL25 w/ 100 gr sierra flat base bullet and CCI BR2 primers- velocity was 3334, the same as with the 75 gr bullet test! Pressure seemed fine. I intend to refine this load for accuracy. I think it will make a nice deer/antelope load.

I did a little more testing today for my version of a 6mm-06 improved. Was hot out! right at 100 degrees. adjusted seating depths a little: Results were: chrono at 15 ft. from muzzle.

100 gr Sierra/57.5 gr/IMR 4831/3547 fps COL 3.201" close to Max.
90 gr sierra/57.5 gr/IMR 4831/3625 fps COL 3.201"
100 gr Sierra/56.0 grs/IMR 4831/3402 fps COL 3.201"
75 gr MBR/56.0 grs/IMR 4831/3630 fps COL decreased to 3.092"

Alan did you ever pick those dies up?

Dan when you getting to Bozeman again?

Any of the rest of you fellas been running your big 6's lately?

MD

Mark:

I am ashamed to say, I haven't "run" my 6-06 since I was in New Mexico shooting p-dogs in May. I plan on shooting it in a 500 yard prone match, actually I want to shoot 3 different rifles, soon. Our club dosen't care what you shoot, as long as you don't try to "win" the match when you use different rifles. Gonna shot a string with my 6.5-06 also. Thanks for the reply, will keep all posted.

Jerry

Good luck-let us know how it goes..

MD

anybody had any experience with the 115 gr berger's in a 6mm-06? I picked up 200 bullets made to follow the berger specs. Just wondering what experience any one has had with these long pencils.

Rober I've not had one of those go down the tube of my rifle. I'd bet I won't either.

No if I had a quick twist instead of a 10 I'd maybe give it some though. I have shot the 105 and 107's though and they shot allright in my rifle.

I've had such good luck at long range with the 95 NBT that it's been awfully hard to try anything else.

Let us know if you do.

MD

I thought I'd give a couple a try in my rifle. I certainly do not have a 1 in 7 twist barrel, so stability will obviously be a big ???. But price was right and I'm experimenting with this rifle. These bullets are 1.337" long! makes my COL 3.414" long. I'm guessing that I can get them to around 3100-3200 fps.

I like the 95NBT's as well. My very first rounds I made up for fireforming went in .70" for five shots (outside spread). I also recently made a buy on 600 remingtion 100 PSBT. So I have to do some loading to see what they will do in the accuracy dept. I will be using either the 95NBT or 100 gr. PSBT remington's this fall for some long range antelope shooting out here in eastern montana. Gonna just sit in a spot I've picked out and pick my shots. Rifle weighs in at 16+ lbs. so I don't feel like lugging it all over. Would like to build me a lighter weight version. cost of custom reamers is pretty steep though.

Robert-it'll be fun to see if they will shoot, let us know what you find out.

That M600 is a neat lil round, a fella elk shooter from Bozeman has used his M600/6 with 100 Rem factory rounds for a lot of years. I can't remember a time when he failed to collect his bull/cow for the freezer.

Don't tell anyone about that though lest I get some nasty grams! grins

You mentioned the gun weighs 16 lbs, is that your 6/06 or the M600?

Thanks

MD

If you built one would you go 6/06 or what, I do have a reamer at my smiths.

MD

Hi Mark,

I think you misunderstood me. I bought 600 remington 100 gr btsp bullets. I would like to have a M600 though. The more I experiment with my 6-06 improved the more I like it. I've loaded up some test rounds with the 115's to see what they will do but have not fired any yet. It is the 6-06 that weighs 16lbs. I've managed to pick up another nice stock to put this cannon in for hunting which will shave a couple of pounds off the weight.

I would like to build up one of my 1910 mexican mausers with the same cartridge in a light carry rifle. I tend to have one heavy rifle and one light rifle in each caliber that I own.

Some might say the 6mm is to light for elk. I don't. bullet placement is more important than the size of the pill. I remember a fella here that shot a nice bull elk with a head shot using a .222 remington at about 100 yds. Just kinda depends on what a hunter can actually shoot well with and has confidence in. I didn't draw an elk permit over here this year so I'm not likely to get to try my gun on any this year. I certainly would have no hesitations about busting one with this rifle.