I would love to see a vid of 700 grains of powder being touched off under a 3,500 grain projectile

Swing by my house, I'll provide the rifle, the powder and the ball, and I'll even run the camera. But you have to do the shooting, because I have taken the 2 Bore Boxlock up to 500gr FFg and that is as far as I care to go.

Colin

Dang, where was this deal six weeks ago? I was in St Louis and could have easily talked my brother into a day trip like that one...
My wife says we have to meet my Mother and her (wife's) Uncle in Chicago for a Cards/Cubs game in the spring. If I drove out...
Let us just say that would be an awesome side trip and leave a day early.


Rich

quote:

Originally posted by CowboyCS:
Swing by my house, I'll provide the rifle, the powder and the ball, and I'll even run the camera. But you have to do the shooting, because I have taken the 2 Bore Boxlock up to 500gr FFg and that is as far as I care to go.

Colin

I'll take you up on that is I ever get over there

You guys would be well advised to listen to Colin here. 700 grains of FFG in a 26 lb gun ESPECIALLY with the added pressure of a solid/cartridge load is a non-starter without some recoil damping aid. You should be working up loads very carefully to find your respective personal limits.

Mac,

do you make softpoints for the two-bore yet?

Rich

Boomie,

squeeze Mamma for a couple hundred bucks and we'll make that run come spring time.

Rich

OT,

But Senor Sharpshooter, gcould you make me 20 of those RCBS FNGC bullets over the winter at an appropriate Brinell for 1,650 to 1,700 fps?I can pay for the lead, tin, antimony and arsenic.

OK, back to regularly scheduled topic.

LD

Collin- I looked at your website. I'm sure your gonna have fun cutting out that action. I dont have that kind of patience so all the more power to you. Next time call me and i'll profile that out for you by CNC in a few hrs.-Rob

Robgunbuilder,
I appreciate the offer, I don't have any thing but manual machines in my shop. I can't afford CNC and even if I could, I don't have the knowledge with CAD and g-code to make them work.

I have a question though, you say it would only take a couple hours to profile that action out with CNC, but how many hours do you have to spend in front of the computer before you can go to the machine with your design? And do you have to run a test blank in wood(or something else) to verify that all the code is right and the tool paths are correct before you run the actual action?

My limited experience around CNC has shown me that if all you are doing is a one-off piece the manual machine is only slightly slower. By the time you add up the computer time, and then run the test piece, and correct any tool path errors and then run another test piece to verify, and then finally run the actual piece, all those hours add up to nearly the same as manually cutting it out. I understand that after that the 2nd, 3rd, 4th....ones are very fast because it's just a matter of indexing the same size stock and then let it run. But the first one is a time consumer.

I could be completely wrong about this though since I don't have any real hands on experience with CNC machines.

Colin

Whoa!

RGB doing public service announcements. Perhaps you could offer to program and run a dozen sets after the first one is functional and been test fired. Would that not be the route to follow? I am serious here; you (RGB) would have a tested model to work off of. Colin's customers would benefit from your' precision machining capabilities, and he could get them out quicker.

just a consumer...


Rich

Colin- I'd estimate about 2hrs to lay out the complete profile you are showing in CAD-CAM. Profiling is really easy and I do it all the time. I can load the code on the machine and check it out on screen in a few minutes. Profiling is so simple,the code rarely needs much correction. Depending on the steel and speeds and feeds, cutting something like that out usually takes a few hrs. The only problem is if you chip a flute or break a tool in the process. Then you have to fix the problem and restart which can get tricky. Yes, sometimes its faster to go manual, but its SOO labor intensive.-Rob

THANK YOU RGB!!! for the post. I do envy people like you who can visualize and then have the skills and machinery to make things!

Rich
A two-bore in every pot, the heck with chicken!

Its not that hard to learn. I taught myself. Good cad-Cam programs write G-code thats nearly perfect. They have verify functions that let you visualize the tool path and can detect potential crashes. Then you up load into the machine and verify again. Catching any errors takes awhile and can lead to some spectacular crashes though. Just one or two of those teaches you pretty quickly. Probably better to do that on someone else's machine! G-code is simple math basically and after awhile you can read it easily. Thereal trick is knowing enough basic machining to pick the right cutting tools and making ridged set-ups as well as knowing how to dial indicate the x,y and z axis to zero. A profile like your doing is really easy stuff. Nothing like hitting cycle start and coming back to a finished part. My manual mill now basically is used only as a drill press.-Rob

And then there's the price of equipment and the tooling to make it all work properly, which all happens to be out of my reach right at the minute.

Colin

Colin- The times are hard and lots of shops have gone under. Machine shops get about the same price per hr as auto mechanics. Look around and you might be able to find some real good equipment at bargain prices.-Rob

Part of the problem is were I live, I'm almost exactly in the center of the country(within 85 miles of exact center). If I lived on either one of the coasts I could have filled a shop full of used equipment by now. I see tons of stuff up for sale in the NorthEast and in California all the time for good prices, but for some reason that same equipment in the Midwest is worth gold.
And freighting or driving half way across the country to get it is expensive.

Colin

I updated the build with new pics and documentation of how far I made it on the Monoblock this week.

2 Bore Underlever Project

Enjoy

Colin

Looking good! Yeah, get those boys trained so you can have a full staff going and you can start cranking out more fine rifles....

I talked with Colin this evening. Comic relief, some say. For one of us anyway...

You guys stop bugging him about other calibers, okay? He's going to build four of these a year, and about half a dozen are pretty much spoken for.
Do the math.
Then, he can start on those puny six-bores you girlie-men are crying for.

Rich

quote:

Originally posted by boom stick:
I would love to see a vid of 700 grains of powder being touched off under a 3,500 grain projectile

Na....u eeval caneeval..u wanna see somebody gettin` killed

quote:

Powershopping

lol

What little progress I made this week is update on my website.
2 Bore Underlever Project

Colin

pretty neat. How is Junior coming along?

Rich

quote:

Originally posted by boom stick:

quote:

Originally posted by degoins:
Ok, I'll go in the opposite direction and lobby for an 8 bore......action scaled accordingly of course.

That would be the bees knees...
Double as a shotgun

Boomie - I must have missed something here, but I'm sure you are aware that even the 4-bores were more commonly shotguns than rifles?

The last 4-bore single shot I had my hands on was clearly marked "For ball or shot". The double 4-bore before that was accompanied by several boxes full of 4-bore shot shells when it arrived.

Well I guess I could have made myself more clear. You can still get factory 8 gauge ammo was my point.

quote:

Originally posted by boom stick:
We need a pic of what 24 drams of powder and a 3500 grain projectile looks like say next to a 308

From Macifej's website
3,500 grain lead ball and Macifej solid



600, 700 NE and 2 bore

Word is - Michael458 is gonna do some of his infamously thorough indoor testing with the 3500 grain FN ...

I'd buy tickets for that show!!

Rich

quote:

Originally posted by Idaho Sharpshooter:
I'd buy tickets for that show!!

Rich

Comin' up shortly. I'm shipping a box of 3500 Grain FN's to a customer today.

I've posted another update to my website.

2 Bore Underlever Project

Colin

quote:

Originally posted by Macifej:

quote:

Originally posted by boom stick:
We need a pic of what 24 drams of powder and a 3500 grain projectile looks like say next to a 308

From Macifej's website
3,500 grain lead ball and Macifej solid



600, 700 NE and 2 bore

Word is - Michael458 is gonna do some of his infamously thorough indoor testing with the 3500 grain FN ...

That pic is alarming.....

Colin,
that baby is moving right along.......and looking good. Keep em coming.

this is really neat. Being able to watch a project like this come to fruition; knowing I am about #3 on the list for one.

Rich

I'm glad you all are enjoying the build. The newest update is posted:
2 Bore Underlever Project

Colin

Colin, you definately have the eye for this stuff. That is going to be one sweet beast.

How's it goin' Colin ...??

Not much progress this week. We had a very heavy very wet snow last Monday and it snapped something like 300 power poles in the area. We were without power for a few days, so not much got done on the rifle. I did get my new rotary table, and the wood finally arrived. This week I have family visiting for thanksgiving and next week my brother is coming for hunting season, so I don't know how much I will be able to get done. I'll post an update as soon as there is one.

Thanks
Colin

I decided to break this build up into multiple pages on my website. The last build just ended up being a huge page and became very bulky to load with all the the pictures and video, so in an effort to make it more user friendly I'm onto page two now with links back and forth between the multiple pages.

Here's the link to page 2 with the latest update:
2 Bore Underlever Page 2

Colin

I bet you all thought I gave up on this....nope just a slight(maybe more than slight) delay in updating.

Here's the link to the latest update:
2 Bore Underlever Page 2

Colin

Another update on the project is posted on my website for those who are following along.

Here's the LINK.

Colin