lancetkenyon
Well-Known Member
Nice!
6.5mm is my favorite caliber, with .257 a close 2nd.
I have six 6.5mms:
6.5SLR
.260AI x2
6.5SS x2
6.5PRC/SI
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6.5mm is my favorite caliber, with .257 a close 2nd.
I have six 6.5mms:
6.5SLR
.260AI x2
6.5SS x2
6.5PRC/SI
MagnumManiac
Well-Known Member
@lancetkenyon
My favourite is, and always has been 25 cal, it is so underestimated it simply defies book ballistics.
I have:
257AI.
25-06 (3).
25-300WSM (Pronghorn) (2)
257 Weatherby (factory Accumark) & another blank with 8.5" twist, still can't find a 7.5" or 7" twist blank here. Looking at doing a 25-300 Weatherby…
6.5mm is a very close second for me, but 30 cal outshines it with number of rifles I have.
Cheers.
My favourite is, and always has been 25 cal, it is so underestimated it simply defies book ballistics.
I have:
257AI.
25-06 (3).
25-300WSM (Pronghorn) (2)
257 Weatherby (factory Accumark) & another blank with 8.5" twist, still can't find a 7.5" or 7" twist blank here. Looking at doing a 25-300 Weatherby…
6.5mm is a very close second for me, but 30 cal outshines it with number of rifles I have.
Cheers.
A speedy 257 bullet of the correct construction does things greater than it "should" for certain. Said it before, I'll say it again.
It's also a true dual purpose. And great both ways.
I've only had 4 different ones.
25/06
25/06AI
25 Sherman LA
25 Sherman Short
I suspect a Sherman Max may be next. Dude borrowed my reamer and won't send it back.
It's also a true dual purpose. And great both ways.
I've only had 4 different ones.
25/06
25/06AI
25 Sherman LA
25 Sherman Short
I suspect a Sherman Max may be next. Dude borrowed my reamer and won't send it back.
lancetkenyon
Well-Known Member
For 257s:
Long before the heavies came out:
Had a 25-06AI I shot out
Had a 250AI
Now:
25CM x2
25MBK
25SST
25PRC/SI
Long before the heavies came out:
Had a 25-06AI I shot out
Had a 250AI
Now:
25CM x2
25MBK
25SST
25PRC/SI
MagnumManiac
Well-Known Member
What is the 25MBK?
Is that a true SA cartridge?
Looking at something 25 to go into my custom trued Rem 700 VSSF II switch barrel. I have a 3.15" mag box.
Cheers.
Highvoltage
Well-Known Member
6.5 prc if you don't reload, saum if you do. Best wishes
lancetkenyon
Well-Known Member
25 "Man Bun Killer" (as in Creedmoor Killer)
True SA cartridge.
25-260AI with some tweaks.
OAL @ lands just under 2.980" w. 131 SMKs and 135 LRHT. 133s are a touch shorter.
MagnumManiac
Well-Known Member
So, I could run my 260AI brass into 25 cal…. Never thought of that tbh. I was thinking 250AI a few years back.
What twist you running with that?
I can only get 8" or 8.5" twist currently, wanting 7" twist.
Cheers.
lancetkenyon
Well-Known Member
I use my .260AI FL bushing die and neck down. That was my tweaks to the reamer design. JGS had a "25-308 Imp 40°" reamer, but it was way different than the ".260 Rem Imp 40°" reamer in the body dimensions. WAY off. So I worked with them to make the body/ahoulder exactly to the 260 reamer, and then altered the neck/FB/leade to match the 25CM BJ2 design. I am very pleased with the outcome.
My goal was to match my two 26" 25CM velocities (2976 & 2985fps), but in a 22" barrel.
I have surpassed those speeds. With only 50 pieces fire formed, I loaded up 15 rounds in once fired brass to see where speeds might end up. I hit 3044fps with the 131 SMK on shot #65 down the barrel and no pressure.
My goal was to match my two 26" 25CM velocities (2976 & 2985fps), but in a 22" barrel.
I have surpassed those speeds. With only 50 pieces fire formed, I loaded up 15 rounds in once fired brass to see where speeds might end up. I hit 3044fps with the 131 SMK on shot #65 down the barrel and no pressure.
MagnumManiac
Well-Known Member
Thanks. Sounds exactly like what I'm looking for. I will look into this a little deeper and design a reamer.
Cheers.
lancetkenyon
Well-Known Member
If you want my reamer print, I can send it over to you.
Shane Lindsey
Well-Known Member
- Joined
- Jul 13, 2010
- Messages
- 3,927
Not any of these cartridges, but just a plain old 6.5 PRC. 110 Hammer Hunters w/Rl26 at 3507 FPS. That is top end and will probably bring it down just a touch to conserve case life.
Magnum, you can use a 243 AI reamer, use a reamer pilot bushing adaptor for a 25 cal pilot bushing, then use a uni-throater.
MagnumManiac
Well-Known Member
Thanks. Well versed in designing reamers and cutting chambers & throats. I like my own leade angle generally speaking, a few tweaks here and there offer better ballistics, especially with the Improved 40° shoulder.
Cheers.
