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PostPosted: Sun Jan 22, 2017 2:00 pm 
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Location: Coalmont BC
NOE is currently running a Group Buy on this Bob's Boattail.... http://noebulletmolds.com/smf/index.php ... 632.0.html

Image

As designed, it is a 65 gr. in .257 cal, and the mould will be available with a Lyman style HollowPoint pin in one cavity, producing a HP bullet of about 62 gr.... It is designed for a 14" twist, like the TJ's 25-20 liner.... I have asked Al Nelson of NOE if this design could be made smaller to fit airgun barrels, but have not yet received a reply.... As you likely know, our barrels are not well standardized, they are anywhere from 0.250" - 0.254" groove diameter (at least).... and there is no standardized twist rate.... The Green Mountain barrel on the MRod is 15.5" twist, and I'm betting this bullet would work OK in that if you didn't drive it too fast.... it looks like 800-900 fps should be OK, maybe a bit more.... The LW barrels are 17.7" twist, they could be too slow, and I think Hatsan is the same.... The Korean guns, I haven't a clue what the twist rate is.... If anything the BBTs seem to be working fine in barrels of a slower twist than the original design calculations predicted.... For sure the TJ's .25 ACP liner, with its 14" twist, should be great, and I know that still shoots pellets just fine.... One other consideration is that this bullet is too long for the Hatsan magazines, or a stock MRod magazine, and I don't think you could even mod an MRod mag. to fit it.... so you would be faced with single loading....

I am thinking this weight could be the crossover bullet between the .25 airgun barrels and the .257 PB barrels, for those guys who want to experiment with a heavier bullet but don't want to commit to changing to .257 cal and giving up the ability to shoot pellets.... If you are interested in purchasing a mould for this bullet in either 0.250/0.252".... or 0.253/0.255".... similar to the way the 41 gr. and 51 gr. BBTs have been made.... could you please post in the discussion thread (not in the Group Buy just yet).... at this link.... http://noebulletmolds.com/smf/index.php ... 094.0.html .... The 0.250/0.252" would be about 62 gr. FN / 59 gr. HP.... and the .253/0.255" would be about 63 gr. FN / 60 gr. HP....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Mon Jan 23, 2017 11:54 am 
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Joined: Mon Sep 07, 2009 9:23 pm
Posts: 282
Location: SW Ontario
Bob I would be interested in getting in on a group buy. I will be using them in a stock Air Force Condor barrel, so not sure which size would be best.
Thanks,
Rae


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PostPosted: Mon Jan 23, 2017 1:22 pm 
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Location: Coalmont BC
I believe Air Force use an LW barrel, which would use the middle size (0.253/0.255") as the LW barrels have a 0.254" groove diameter, according to the LW website.... See my comments above regarding twist rate....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Mon Jan 30, 2017 12:07 am 
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Joined: Thu Sep 01, 2005 12:45 pm
Posts: 4897
Location: Calgary
I have an Lothar.25 Polygon 10 groove barrel for my Condor, I would like to test some, thinking around .252 or .253?

My barrel prefers .25 JSBs the best. At 150 yards still burns thru 3/8" plywood and vents gophers as well.

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Air or Powder the endless debate..........


Last edited by randyhub on Mon Jan 30, 2017 12:20 am, edited 1 time in total.

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PostPosted: Mon Jan 30, 2017 12:11 am 
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Joined: Sat Nov 03, 2007 4:19 pm
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Location: Coalmont BC
Thanks very much to Al for deciding to offer this bullet in three sizes.... The choices available will now allow it to be used in airgun barrels as well as the standard .257 cal PB size.... The profile will be identical for all three sizes, allowing one tool to be used for the machining.... so all the diameters will vary by the same amount, and for the .250 and .253 cal the bullet will be 0.014" shorter, with an overall length of 0.500".... This length reduction and slight increase of the boattail base diameter (for the 0.250" and 0.253" versions) will allow them to stabilize in a slightly slower twist.... The 0.253" should work great in the Green Mountain barrel with a 15.5" twist, as used on the Marauder.... while the 0.250" will of course be fine in the commonly available TJ's .25 ACP replacement liner, with it's 14"" twist.... The 0.250" will weigh about 60 gr. as a FN solid, and the 0.253" about 62 gr.... with the HP versions 3 gr. lighter, of course....

All three calibers are now available at the Group Buy, please specify what diameter(s) you wish to order.... http://noebulletmolds.com/smf/index.php ... 632.0.html

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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