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Author Topic: 444 marlin on an SB1  (Read 551 times)

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Offline colonelsanders

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444 marlin on an SB1
« on: February 10, 2011, 09:37:38 AM »
Guys, I have been doing some research and I think it will work.  H&R will put a 44 Mag barrel on an SB1, the mag round generates upwards of 40K+ PSI according to Hodgdon.  The 444 also stays right at 40k+ PSI from there loading data.  If the handloader was to keep loads safe do you guy think it would be safe to use a 444 on a SB1?
Colonelsanders
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Offline quickdtoo

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Re: 444 marlin on an SB1
« Reply #1 on: February 10, 2011, 09:57:47 AM »
You're mixing CUP and PSI, the 44mag has a SAAMI MAP of 36kpsi (old standard was 40kcup), the 444 has a SAAMI MAP of 42kpsi(old standard 44kcup) and a bigger case head, .471" vs .457", I wouldn't recommend the 444 on an SB1 at all if there's even a remote possibility of someone else ever loading it with factory ammo when you're not around, just leave it on an SB2 frame and know you're safe.  ;)

Tim

http://www.lasc.us/SAAMIMaxPressure.htm



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Offline colonelsanders

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Re: 444 marlin on an SB1
« Reply #2 on: February 10, 2011, 10:10:16 AM »
Quick, your right I did mix up psi and cup, but I found load data keeping the 444 under 40k either way.  There is NO chance of factory ammo going in, havent had factory centerfire ammo in the house in 9 years!  From what I have read here and elsewhere I think the SB1 is like a contender and a SB2 like the encore, fine for low pressure but not for high.  I would even think the SB1 could easily handle trapdoor 45-70 loads.  But thanks for your thoughts Tim.
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Offline bikerbeans

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Re: 444 marlin on an SB1
« Reply #3 on: February 10, 2011, 11:11:15 AM »
Colonel,

I would be worried about what happens with the 444 barrel on an SB-1 frame when I am gone.   Someone gets that setup at an estate sale might just load some factory ammo or a hot reload and have a rude awakening.  I have a 357 Maxi on an SB1 frame and I have chosen not to restamp the barrel with the thought down the road that folks would only load it with 357 Mag ammo & not a hot 357 Max load.

BTW, good choice with the 444M it is my favorite handi caliber.

BB
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RIP Tom: Tom Nolan, ( bikerbeans) passed away this afternoon (02-04-2021).

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MINE:  270W, 308x444, 44 Bodeen, 410 shorty rifled slug gun, 445 SuperMag Shikari, 45 ACP shorty,  45-70 Shikari, 45 Cal Smokeless MZ, 50cal 24" SS Sidekick, 50 cal 24" Huntsman, 50 cal 26" Huntsman, 50 cal 26" Sidekick, 50-70 Govt Shikari, Tracker II 20 ga shorty, 20 ga VR Pardner, 20ga USH, 12ga VR NWTF, 12ga Tracker II shorty WITHOUT scope, 12ga USH, 10 ga  Pardner Smoothbore slug gun & 24ga Profino Custom rifled slug gun.

Offline Goatwhiskers

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Re: 444 marlin on an SB1
« Reply #4 on: February 10, 2011, 12:00:06 PM »
In good conscience you should keep in mind what might happen when you're gone and someone not in the know gets hold of paw-paw's gun.  In my years gunsmithing I have run into many cases of people wanting to shoot shotguns with short chambers, damascus barrels, etc.   Just waiting for someone to discover that a .444 will chamber in a .410 and tries to shoot one.  Goatwhiskers
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