Do you have any load and speed particulars for the 25 RUM?
AMAZING!
AMAZING!
25-06 AI and 67 grain Shock Hammer
- Thread starter ButterBean
- Start date
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Sexy, just sexy!
That is why I usually start off with a 30" barrel, when it is shot out cut off 1/2 inch at the end rechamber it and your good to go, you can do that up to 6 times or sometime I just go to a bigger chambering IE: 308 to 30-06 to 300 WinMag then finally to 300RUM without cutting an inch off due to the longer case cuts deeper into the chamber. like I said in my privious post my gunsmith has a steady flow of stuff of mine.
Dean
Dean
At least what powder prooved slow enough for the 25 Rum in a 30" barrel?
With a 14 twist@ 5000fps the bullet would be at 257,142 RPM
US869 or H50BMG no just kidding LOL
H1000
Retumbo
RL25
RL33
All worked fine for that application, I did try the 50 powder it worked great it was just dirty. One trade secret I am willing to give out is the use of non mag primers it prevents "Bridging"
and they also reduces spikes in pressure.
Bridging explination for those who are so inclined
Powder Bridging??? Fiftydriver
Hey Fiftydriver, what exactly is powder bridging? I have noticed you mentioned it a few times. The only info I could find was about the powder getting stuck when it is poured into the case. And that doesnt sound like it.
Dean
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Which is fine for a copper jacketed bullet, they are good up to 300,000 RPM give or take before comming apart "also depending on how rough the rifling is" The 14 twist for the 115gr on paper is to slow to stabilize them but it did, my take is the 4000FPS had something to do with that.
Dean
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Well I've never had such luck, 4400 was all I ever got before they started coming apart with a Middlstead and they would never survive the launch out of the Hot Tamale, but I have never had a 257 Allen Magnum so who's to say
Friend of mine has two 25 STW. One is a Ackley. Haven't shot them in years. If I remember we approached 4000 FPS with a 110 Accubond and a E-Tip. Powder bridging was a problem. Ram shot powder seemed to help. Should maybe explore them again with some Hammers.
I had one back in the day but I think I met the point of diminishing returns, I would have needed a 30" tube to see any significant gains, with today's powder selection I think it would do better
swat
Well-Known Member
I have a 257 stw it's fun 100 gr. tttx at 3890, true killer. set back at 587 rds. pac-nor barrel.
