Q:

7mm BAM 50

Well, I made a post about it over at the GTA (yemx), so I said to myself, “Self… why not make a post over at the TAG too?” So here we are. Any help would greatly be appreciated!!!

Build plan:

-BAM 50 as the base rifle
-30-31″ TJ 1-14″ 7mm barrel (same barrel that Ced has on his Corsair)
-Tethered @ 2900-3k psi (but tuned for 1-2 shots off tether) (probably with the “97” CU FT 4500 psi tank)
-CF Sleeve for the barrel (.50″ id. x .632″ od. bigger od if I can get it)
-Riser for the breech (only to clear the barrel sleeve I don’t need no stinkin LDC!!! 😆 )
-Converting to a side cocker, to take strain off the bolt
-Reshaping the trigger… thinking about a swept-back trigger. The factory trigger just looks like shit, and is too skinny. Ideas:


-Set up for 95 gr Boat Tail, designed by Bob on the GTA
-Attempt to retain as much BAM 50 parts as possible- I want it to look like a slightly modified BAM, not a 1-off rifle!!

Problem areas:

-Hammer stroke- need to get a bit more. Estimated 1″ is achievable. Stock travel is around 0.52″.
-Valve porting- may need to move some stuff around. i.e. move the valve seat forward. I could also move the port back, but I really don’t want to have a new tube and breech made… Here’s a pic of the stock transfer port from another tuner… it’s TINY:

I’ll keep everyone updated. This should prove a fun build!! :8:

Other Guns

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Viewing 7 replies - 1 through 7 (of 7 total)

I just PM’d you a short while ago! 😆 :rofl:

How is the BAM coming along?

quote Caboose212:

Yeah- I had that one explained to me by Bob… If it were 3k psi, it would be 97 cu ft, but since it’s 4500 psi, it’s true capacity is about 88 cu ft… Kind of a bummer, but hey… it’s still a lot of air!

If it were 3k it would be something quite less than 97( as that number is derived through the Ideal Gas Law at 4500 psi ). At 3k Boyle would be applicable. I do prefer to tether with an 88; though all my re-filling tanks are 44’s and they get charged up full.
cheers,
Douglas

Yeah- I had that one explained to me by Bob… If it were 3k psi, it would be 97 cu ft, but since it’s 4500 psi, it’s true capacity is about 88 cu ft… Kind of a bummer, but hey… it’s still a lot of air!

caboose, that 97 cu ft rating is bogus; it is done with the Ideal Gas Law, and air is not ideal. Its actual compressibility leaves those tanks as they are rated by their manufacturers…88 cu ft. The big SCBA tanks are all the same size…:D
cheers,
Douglas

At this point, I may just do this up as a .257…

Sounds cool! Please keep us posted on the progress and pictures, pictures, pictures!
Wildfire :5:

Viewing 7 replies - 1 through 7 (of 7 total)

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