what is a good twist rate for a 35 whelen Ackley improved? i want to shoot around 250 grn though it
Thanks
Link23
what is a good twist rate for a 35 whelen Ackley improved? i want to shoot around 250 grn though it
Thanks
Link23
No slower than 14. I have a 1 in 16 that so far is fine with all 250 bullets that I have tried, but I recommend hedging your bets with just a a bit quicker.
I have a 35 Whelen that has a one in 10 twist barrel. The previous owner shot lots of 250's and 270 grain bullets and his records indicate good good groups at 200 yards.
I have not done as well. I had lots of problems with hangfires in cold weather, replaced the mainspring for one thing. This is also a lightweight rifle and kicks something awful. Flinching is not helping group size. The rifle had the worst hangfires with AA2520, a ball powder, it did very well with IMR 3031 and IMR 4064.
I really think IMR 3031 may be the best overall powder in this caliber. I am thinking of trying N135 in the future.
I would use Federal primers as they are the most sensitive primers out there. I am of the opinion that the standard Whelen has a very slight shoulder and that cushions the firing pin blow.
Wish I have more chronograph data, I shot 250's but the weather was too cold for my chronograph.
Code:35 Whelen 1:10 twist 24" Douglas barrel 225 Sierra SPBT 52.5 grs IMR 4064 wtd Lot 2449 CCI 200 OAL 3.30 necked up R-P 30-06 16 Oct 2009 T = 65 °F Ave Vel = 2260 Std Dev = 34 ES = 113 High = 2331 Low = 2218 N = 10 nice rounded primers, smoked case necks, most accurate load no hangfires! 225 Sierra SPBT 53.0 grs IMR 4064 wtd Lot 2449 CCI 200 OAL 3.30 necked up R-P 30-06 16 Oct 2009 T = 65 °F Ave Vel = 2270 Std Dev = 24 ES = 56 High = 2290 Low = 2234 N = 6 nice rounded primers, smoked case necks, no hangfires 180 Sierra SPBT 58.0 grs IMR 4064 wtd Lot 2449 CCI 200 OAL to cannulure necked up R-P 30-06 16 Oct 2009 T = 65 °F Ave Vel = 2506 Std Dev = 19 ES = 56 High = 2529 Low = 2473 N = 10 nice rounded primers, smoked case necks, no hangfires
Link23,
I'll echo the advice about the 14" twist for the 35 Wh AI. Been there, done that with both the Whelen and Whelen AI. The AI is a good choice and if I tout its superiority over the regular Whelen again, it may start another yabut war
No matter, the 14" twist WILL stabilize 250 grainers. If treated and loaded right it is a very very nice cartridge.
On a side note, if you can find a Lee neck collet sizer for the 35 Whelen it will also work for the AI version. Lee used to make a few but don't know about now.... maybe a special order item now. The Lee neck collet is the best neck sizer I've found for accuracy oriented reloading of bottlenecks- and yes, even better than the much more expensive Redding neck bushing dies and the Wilson/Sinclair neck bushing dies.
My .35 Whelen has a Douglas 1:10 twist barrel and I am very happy with it. I'm glad I listened to my gunsmith when we chose the barrel.
"The worst wheel of the cart makes the most noise." - Benjamin Franklin
"To compel a man to subsidize with his taxes the propagation of ideas which he disbelieves and abhors is sinful and tyrannical." - Thomas Jefferson
Assuming the OP wants to shoot cast, perhaps at 2200 - 2500 fps, the 14-16" twist will be a lot more user friendly.
Larry Gibson
I must agree with Larry on this. For jacketted bullets, for long range and straight line penetration on game a fairly fast twist may be an advantage. For cast shooting a 14 twist is the fastest I'd go. Most folks here report good accuracy with the 280 gr. Bator group buy boolit with 14 twist. I have a 358 with a 16 twist that handles 250 gr. boolits just fine. The 14 twist is a little more cast friendly than the 12 and should allow an increase in achievable velocity. Ron.D
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