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.257 Bulldog

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Hobbyman2007:
Can’t wait to see some pics of it completed. That’s some real good power . Make sure you get yourself some 257420 bullets . These barrels absolutely love them. I did something similar with the 70-35 Winchester and it was much easier to get power out of than the .257 disco. I really need to get out and shoot it some time . It’s just a bit overkill for rabbits and partridge inside 30 yards .

steveoh:
This is great. I love my .257 Texan and .257 Citrus, but holy cow they are both long and front heavy. I've love a powerful bullpup in .257 for more ease in handling.

mackeral5:
Thanks for the encouraging words. 

The Bulldog is a great all around platform.  it has a sidelever, ample, versatile hammer system (105 gram OEM hammer, plenty of room for more spring/stroke, OEM hammer can be whittled down below 50 grams), over 300cc of air storage, and a .375 valve throat.  There is plenty of room in the valve pocket for Cobra chambers, even adapted in a Cothran Powerhouse valve in one.  At some point I may see how the Cothran works in this one. 

Currently the gun is running a peek poppet from the Cobra valve I use in regulated applications, with no return spring.  Initially I tested the .257 with the Cobra chamber, but I removed it for testing max FPE.  An observation on Cobra valves....whether low power, or high, it seems the air spring effect drops max velocity by about 25fps.  Disable the cobra chamber and velocity increases by approximately 25fps.  I saw that effect with this gun.  I will likely reinstall the Cobra chamber for further testing.

I have completed 2 BD barrels conversions, with a 3rd still in process--a TJ's 1:26 .357 and this TJ's .257 1:14.  The third is 32" of TJ's .457 in process for another BD build.  I expected the .457 to be ready by now, but sometimes things take a bit longer than expected.....

Once the muzzle adapter arrives I'll be ready to fully assemble and put rounds on paper. 

Here is a random observation....  When you are used to regulated guns, shooting an unregulated big bore seems so much more extreme....I think the word violent is a fair descriptor... 

Have to order more ammo.  I like the 71gr from Hunter Supply but their pricing has gotten to be very unreasonable.  Can anyone recommend a similar bullet/source? 

Hobbyman2007:
Mike ,

Are you modifying the magazines for each caliber ? I wonder if there’s someone out there that would print new ones .

mackeral5:

--- Quote from: Hobbyman2007 on December 18, 2020, 07:41:12 PM ---Mike ,

Are you modifying the magazines for each caliber ? I wonder if there’s someone out there that would print new ones .

--- End quote ---

Denis, I haven't modded any magazines yet, and it won't be a simple task to do a caliber conversion. 

IMO the OEM mag is a good enough design and caliber swaps are so rare, I don't see it being worth anyone's  while to print a mag.  Darko's mags are awesome, and I know he could do it, but I don't thing it being a very profitable venture.

Something strange about the BD platform and my shooting habits----so far I have only punched paper for that I rarely use the mags.and never use the single shot trays.  Someday I would like to hunt with the platform, then magazines will become more of a priority.   

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