Author Topic: Tale of Two BRods  (Read 16319 times)

rsterne

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Re: Tale of Two BRods
« Reply #135 on: March 25, 2018, 09:54:23 AM »
Now that I have proved it can be done.... some enterprising guy (like Lloyd did with his .30 cal conversion) could make new wheels, fit them with the appropriate spring, remachine the housing and cover plate (or make a new cover plate) and supply a .35 cal conversion mag. for the MRods.... It won't take a very long bullet, but I think will cover all the weights necessary for a modified MRod.... It will accept the JSB pellets, the EPP-UG, or my 109 gr. BBT, and likely a few others.... If a new cover plate was made with a groove machined in it, and/or the groove in the front of the housing widened, slightly longer bullets could be accommodated....

Certainly it would serve the purpose of having a .35 cal MRod repeater.... It would be a good idea to upgrade the bolt locking lug to stand the much increased force on the bolt from the larger bore.... but that can be done by going to a 10-32 from the stock 8-32....

Bob
  • Coalmont, BC

rsterne

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Re: Tale of Two BRods
« Reply #136 on: June 28, 2018, 12:24:33 PM »
I cast up the new NOE pellets today.... The mould comes with 4 sets of RG base pins, and they produce 3 skirted pellets and one solid with a flat base.... They look like this....



The weights in 40:1 lead/tin alloy are 35.0, 37.0, 38.5 and 42.6 gr.... They all chamber perfectly in my .25 cal LW Polygonal barrel, but that is not surprising as I cut the chamber to allow for bullets as well as pellets.... I have my BRod set up with a Cothran valve and the WAR adjustable regulated tank block, set at 1900 psi.... I checked the velocity of all 5 pellets (including the JSBs) and got the following averages for one 8-shot magazine of each....

34.1 gr. JSB = 947 fps (67.9 FPE)
35.0 gr. NOE = 937 fps (68.3 FPE)
37.0 gr. NOE = 919 fps (69.4 FPE)
38.5 gr. NOE = 906 fps (70.2 FPE)
42.6 gr. NOE = 871 fps (71.8 FPE)

I was only shooting inside my shop, with the backstop 20 feet away, and all groups were one ragged hole, with no real difference between any of the pellets.... That is encouraging, because some pellets or bullets can't do that when shooting through the Chrony at that distance.... and those that do usually shoot pretty good at least out to 50 yards....

My summer is taken up with sitting at the Motel reception desk waiting for guests, and we are entering our busiest season now, so it is unlikely I will get to try these at distance any time soon.... but the velocity and energy is right where I want it for testing.... I can't wait....

Bob
  • Coalmont, BC

Monkeydad1969

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Re: Tale of Two BRods
« Reply #137 on: June 29, 2018, 05:17:15 AM »
They look good Bob.  Hopefully you'll possibly get a lull in the action at the front desk. Lol

Joe
  • Aurora, Colorado
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rsterne

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Re: Tale of Two BRods
« Reply #138 on: July 03, 2018, 03:02:06 PM »
My parts came in today from Joe at DiscosRUs, and I didn't waste any time whacking the front off the Gen2 MRod stock and grinding it out to fit over the WAR tank block.... Here is what it looks like with the Gen2 trigger installed also, plus a 500 cc 3000 psi aluminum bottle....



I left the stock long enough to cover the tank block and the bonnet section of the regulator.... There is a bulkhead in the stock JUST in front of the front of the tank block when it is mounted in a WAR tube, so about 3/4" ahead of that is where I made the initial cut, and then ground it to fit with my Dremel....

I also purchased a .25 cal MRod receiver and bolt, which I will be modifying as before to fit the .357 cal TJ's 26" twist barrel I have, with a high-modulas CF sleeve glued over it to stiffen it, like I did with the .30 cal barrel.... I already have a modified .25 cal MRod magazine which will give me a 6-shot .357 cal repeater when it is all together.... I probably won't get much done before the winter, but at least I now have all the parts, other than the valve and hammer which I have to make....

Bob
  • Coalmont, BC

Monkeydad1969

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Re: Tale of Two BRods
« Reply #139 on: July 03, 2018, 03:29:39 PM »
Keep it coming, Bob.  Looking good.

Joe
  • Aurora, Colorado
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