338 thunder project

[Eaglet]

This is directed to all of us, it's alright to disagree, but we need to make sure we have the right attitude. Any one can tell when a member is asking questions in a bad attitude. That doesn't help.
A church member that had a good sense of humor once gave me a present, you know me being the pastor and all I did appreciate it; thanks goodness I have not yet used it. I might, though, make a present of it to long range hunting… /ubbthreads/images/graemlins/smile.gif

 

[jb1000br]

They can do the coating later? The bore coating? Even after being shot and firecracked?

What OTHER similar coatings are you referring to?

JB

 

[goodgrouper]

I think that is what MIke told me. It has been awhile now so maybe I'm not remembering it clearly.

I had two proprietary moly fusion treatments done earlier and they were not all that impressive. Maybe this one Mike does is a lot better. What do you think? Ever had it done?

 

[jb1000br]

[ QUOTE ]
I think that is what MIke told me. It has been awhile now so maybe I'm not remembering it clearly.

I had two proprietary moly fusion treatments done earlier and they were not all that impressive. Maybe this one Mike does is a lot better. What do you think? Ever had it done?

[/ QUOTE ]

From what im seeing this will slaughter any moly BS coating, though im not sold yet, as the info is only coming from them, no third party testing that i have seen yet. It is a whole different world than moly, and supposed to take more of a beating than chrome lining.

jury is still out for me...

 

[sewwhat89]

What I meant was 30" barrels and longer (240smk @3100) in 9 lb Sporters do not tend to be as accurate as 52 lb MOAGs. Kirby built his AM with a 5 contour barrel with the BMG flutes to cut back the weight, and he lost the accuracy characteristic of his other rifles.

Am I wrong? /ubbthreads/images/graemlins/crazy.gif

 

[jb1000br]

[ QUOTE ]
What I meant was 30" barrels and longer (240smk @3100) in 9 lb Sporters do not tend to be as accurate as 52 lb MOAGs. Kirby built his AM with a 5 contour barrel with the BMG flutes to cut back the weight, and he lost the accuracy characteristic of his other rifles.

Am I wrong? /ubbthreads/images/graemlins/crazy.gif

[/ QUOTE ]

DUDE, i meant the same package, but in 300tomahawk with a 240! The 30-240 will stomp the 338-250 when they are started at the same vel and yield less recoil due to less bullet weight and powder weight, that was my only point.

a 9lb "anything" wont touch a 52lb "anything," at a mile, all else being equal

GG -- heard back from Tom at ABS:

"The bore lining material that we use must be considered as part of the overall barrel making from the ground up. All internal dimensions must be done so that the application of the bore lining material will bring the internal dimensions to where we want them, within final diamond lapping tolerances. All chambering and rifling must accomodate this prior to application of the lining. The lining application is extremely thin, but it does have to be taken into account when making the rifle barrel."

Looks like you are gonna have to make the decision now and not later if you want it. might be worth trying if throat life is a concern. What better round to test it on...


FWIW,
JB

 

[Guest]

Board

Shame that all of us that appear to like the same sport/things can't be somewhat more mature in our thinking and or responses to post! Forums are for an exchange of information by those wishing to learn and if there's anyone here that thinks that we're all going to think alike....then they should rethink their position! It would be awfully dull if that WERE the case! I just left a board where there was more political BS/bitching/griping than anything else and there are some here that will recognize my name from coming here several months ago! I entered at a time of a very busy work schedule involving aviation work and my arse has been glued to the seat of an Ag plane for the past 9 months and I haven't had time for visiting this forum! I tried to hold out on the other board but IMO...it won't be long before that site becomes a "smoking hole in the ground!" Many old heads have already vacated the area so lets try to keep this site civil and one conducted by mature gentlemen!!

Just my 2 cents FWIW!!

 

[goodgrouper]

THere is another little bit to the story I forgot to type.

Last winter, I worked up a load for a friend of mine's 338 ultra mag. It sported a factory Remington 26" barrel and was on REmmy's LSS package. After shooting it on a couple of 35 degree days, I was absolutely blown away by how hot the barrel would get after only 3 shots! I also was firing a 300 ultra mag Christensen arms carbon wrapped barrel along side of the 338. To my atonishment, the carbon barrel really did take longer to heat up and was quicker to cool down by a huge margin. I was burning almost the same amount of powder (93 grains vs 95) in both cases but the 338 absolutely sizzled. I got the 225 ab's up to 3265 with a deviation of 5 fps or so and 1/2" accuracy, but the gun started walking bad after 3 shots. It was about 8 months later and we started seeing the MOAG get it's throat cooked because of heat on the inside that was having a tuff time making it out to the outside because of the 1.5" diameter barrel. We felt only 1/4 of the heat on the outside that was boiling on the inside.

I put the two experiences together and decided I needed a "cooler" barrel for my 338 hunting rifle. It was about this time that Boman introduced me to ABS and the rest is history. Mike Degerness (president and ceo) told me exactly what I wanted to hear about how his carbon fiber was specifically engineered to be better at thermal conduction than even Christensen's barrels. ANd after feeling the difference between the 300 ultra and the 338 ultra back in the winter, I bought one of Mike's ABS wrap jobs.

So, to do a fair comparison on heat removal and throat life, I will forego the electroless silicone coating this go around. If this barrel does burn out quickly, then I will do another ABS with the coating on it and experiment with that! /ubbthreads/images/graemlins/wink.gif

 

[jb1000br]

[ QUOTE ]
THere is another little bit to the story I forgot to type.

Last winter, I worked up a load for a friend of mine's 338 ultra mag. It sported a factory Remington 26" barrel and was on REmmy's LSS package. After shooting it on a couple of 35 degree days, I was absolutely blown away by how hot the barrel would get after only 3 shots! I also was firing a 300 ultra mag Christensen arms carbon wrapped barrel along side of the 338. To my atonishment, the carbon barrel really did take longer to heat up and was quicker to cool down by a huge margin. I was burning almost the same amount of powder (93 grains vs 95) in both cases but the 338 absolutely sizzled. I got the 225 ab's up to 3265 with a deviation of 5 fps or so and 1/2" accuracy, but the gun started walking bad after 3 shots. It was about 8 months later and we started seeing the MOAG get it's throat cooked because of heat on the inside that was having a tuff time making it out to the outside because of the 1.5" diameter barrel. We felt only 1/4 of the heat on the outside that was boiling on the inside.

I put the two experiences together and decided I needed a "cooler" barrel for my 338 hunting rifle. It was about this time that Boman introduced me to ABS and the rest is history. Mike Degerness (president and ceo) told me exactly what I wanted to hear about how his carbon fiber was specifically engineered to be better at thermal conduction than even Christensen's barrels. ANd after feeling the difference between the 300 ultra and the 338 ultra back in the winter, I bought one of Mike's ABS wrap jobs.

So, to do a fair comparison on heat removal and throat life, I will forego the electroless silicone coating this go around. If this barrel does burn out quickly, then I will do another ABS with the coating on it and experiment with that! /ubbthreads/images/graemlins/wink.gif

[/ QUOTE ]

Makes sense.

Though with a different rate of fire, and different round and bullet, it really isnt a parallel comparison...

JB

 

[goodgrouper]

Got around to weighing all the cases today. From what I've seen, these 338 ultras are quite a bit more consistent than the last several lots of 300 ultra mag brass I've done. Probably because the 300's are way more popular and have many more batches of lots whereas the 338's are probably still on the early lots numbers. WHen the 300's first came out, they weighed 30-40 grains more than they do right now.

ANyway, out of 150 cases, 104 of them went inside three grains (265-268) which is awesome for a case that big! Consider that a Federal 215gm primer weighs about 5.6 grains. The absolute mean spread was about 8 grains, but the vast majority came into the middle. The average was about 267.8.

ALl the cases that were inbetween the brackets I rounded down to the next lightest batch.

I think that this brass is every bit as good as Lapua or Norma brass once it had some tlc. The primer pockets were the only thing I could complain about because they were tight, tight, tight but that will change over time. They were all fairly consistently tight too.

Anyway, here is the pic of the breakdown:

 

[goodgrouper]

Uh oh, I came home yesterday to find a monster in my mailbox! /ubbthreads/images/graemlins/shocked.gif

Kudos to Dave Manson. The reamer showed up 2 weeks early and $15 under budget and it is PERFECT! I was kinda pushing the safety boundaries as far as what Dave likes to do with tolerances on a hunting rig, but I persisted and he made it exactly to my specs right down to the number. He didn't fudge one measurement for liability sake and for that, he will get more business from me. /ubbthreads/images/graemlins/wink.gif Thanks Dave.

 

[älg]

GG, how do you square the case heads?

 

[Guest]

[ QUOTE ]
GG, how do you square the case heads?

[/ QUOTE ]

Wilson...up in Cashmere, Washington makes a cutter that works well for this! They also make FANTASTIC in-line bullet seaters of which I have 5! /ubbthreads/images/graemlins/grin.gif

 

[goodgrouper]

alg,
Rmulhern is right on the money.
You take the Wilson trimmer (the best on the market imo) and insert the case into the case holder. THen you just simply flip it around and cut the head. You will get the feel of it as the cutter takes off the high side or the dome shaped part because it suddenly gets much easier to turn the handle on the cutter. The total cut depth is so minute that it makes no discernable difference on headspace. Most of the time, it barely cuts the burrs off the head stamp lettering.

It is very simple and only adds about 20 seconds to the trim time if that. /ubbthreads/images/graemlins/smile.gif