Discussion in 'Sako Short Actions' started by Branxhunter, Sep 17, 2014.
Gee that came up well!
Thought I would give a bit of an update.
First, some recent activity on the farm - I'll let the pics tell the story
And then the results of some load testing last weekend
So the little .17-222 is still going strong and shooting well. I haven't really spent much time with the 25gn projectiles but these results indicate that some further investigation is warranted.
I always running my 17s abover4000 fps never really produced the accuracy that I was hoping to achieve. That said I was using the older 17 pills 25 gr and the results that I achieved were lack luster. The best projectiles I used were Remington 25 gr corelokt hollow point solid base. These things were unbeatable and produced 1/4" groups at 100 yards.
Your Chrony's measured speeds FAR exceed my Sako 17-222 speeds.
With 25 to 27gr. bullets, at about 3800fps the cases start to get tight in the chamber. I use a Oehler 35P chrono.
BTW.......my velocities pretty closely compare with those in the old Hodgdon manual, for the 17-222.
Just a thought.....
G'day Rick. To date I have focussed on the 20gn projectiles (v/zmax, Nolser Varmageddons) as I shoot 32gn projectiles in my .20-222. The 20gners shoot very well and flat. This is the first time I have tried the 20gn Nosler SHOTS HP and school is still out on them. Based on these recent results I might explore the 25gners a little more though.
G'day Kevin. Yes wise words of caution. The top two loads for the 25gners shown on the target a a little too warm for me, I think I'll try a few lower increments and see if I can find the next lower node. One objective with this rifle has been to try a variety of different powders manufactured by ADI that are (usually) freely available here in Australia - there is not a whole lot of load data for the .17-222, and what is available is often for powders we seldom see here. The ADI powders website provides an indication of equivalence between their powders and those by other producers. To date I have tried AR2207 (equivalent to H4198), BM8208 (IMR8208 XBR), AR2206H (H4895), BM1 (N133), BM2 (Benchmark) and AR2208 (Varget). To identify starting loads I considered loads for the .17 FB, .17 Rem and those I have tried with my .20-222. Unless constrained by available case volume I increased powder increments until I got pressure signs then quit. BM1 has proved to be the clear winner.
Has this been an interesting exercise that has produced some useful information? Yes. Is there a possibility that my Chrony is reading wrong? Always a possibility. Is that an issue if its use is primarily to compare between loads I shoot through it during a session? Probably not. Do I recommend people use any of my loads without first doing their own homework, starting low and working up? No. Should I have provided this background with the post above and/or included the 'start low and work up' advice. Probably, and I'll be more careful in the future.
My hope is that people can enjoy this thread for what it is - a story of beat up old rifle, previously trashed and then condemned as beyond redemption, now with a new lease of life and continuing to do what it was designed to do.
I fully agree.
No matter what ANY chronograph tells you..........BOTTOM LINE, is that it's the case/bolt/and measurements that tell the truth.
Hey Kevin, all good. Keen to hear about and see your .17-222!
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