Paul wrote:Hi all,
I recently chatted with another 22-250 re loader and his loads were significantly less than what I am developing:
Mine - mid range load of 34.3 gr ADI 2206H behind a 55gr V-Max
His - 31.5 gr 2206H behind 55 gr Supa Ross (Sierra)
Accuracy seems to be very good on the 31.5 gr and I'm wondering if going to a lower starting load is the way to go?
My development process to date, based on some previous reading on where to start is like this:
For the powder and projectile, find the upper and lower recommended loads. Start at 1/3 up this scale i.e in the ADI book for 55 gr, max is 35.5, min is 32.5, so start 1/3 up this range and increase by 1% of max load (of 35.5-32.5 = 3gr = .355gr increments).
Make sense?
So am I starting too high, given my colleague is getting great accuracy with 31.5 gr with the same powder? I appreciate different rifles like different loads, but I am wondering if I am starting in the wrong place. Plus my loads from 33.7 to 35.5 are really not getting closer than around 1.5-2 MOA at best @ 100m.
Another re-loader I know has said start 10% below min and work up by 1 gr intervals to start with prior to refining.
Ive been trying to get an accurate load for my Parker Hale Midland Mod 98 for the past 18months. Significant improvements in consistency since floating the barrel (sanding out the stock). I appreciate the rifle is quite aged (bought in 1980) and maybe less than an accurate beast. But its a project and sentimental thing
I have some 2208, and also wondering if for 22-250 what the better powder is. Ive seen and gotten some other suggestions re powders, so what is the thinking on what is best (whats the tech behind one powder or another?).
Thanks in advance.
Regards,
Paul
marksman wrote:the best powder is the one that works in your rifle Paul, but it is good to find out what works for others
l use 36.1gr of 2208 in mine with 50 gr nosler shots, win cases and federal primers for around 3600fps, a very precise load in my rifle that is 1 in 14" twist
my rifle shoots well with 2208 and not really with others, as l said it shoots well but is a one horse pony only shooting this load well
l start @ 7% below max load worked out with quickload for my rifle, max book load is conservative in some rifles and l would test at least just over ADI book max
l'm going to put up a link to what l would recommend for reloading to anyone, if your rifle will shoot, this is IMHO the way to do it, hope it helps
http://optimalchargeweight.embarqspace.com/
TassieTiger wrote:
Interesting read - but is this speed of sound correct ?
Blr243 wrote:How bad ( worst case sceario ) would accuracy be with 60 -80 grain bullets in a 1/12 twist ? If I can shoot 40 grainers superbly and I’m sighted in for such. Then I keep a few bigger bullets in my pocket in case I run into a boar. Disregarding poi diff between the loads , I never have any trouble getting within 40 m of pigs in the dark on foot ...if bigger bullets won’t stabilise in my 1/12 , are we talking 5 or 6 moa?
Blr243 wrote:Thanks marksman. Prior to the gun buy back I had a mini 14 in 223 and it worked fine. I was just wondering what size groups to expect when bullets are not stabilised. 4 moa would not bother me at 50 m( on feral pig sized game) Mostly I’ll stick to the smaller very accurate components when looking for cats n foxes
animalpest wrote:Those Parker Hale Midland rifles were never much of a shooter. Have had, and reloaded for a couple of them (30-06 and 22/250) they were not rated tack hole rifles.
One of their biggest problems was their skinny barrels - like a knitting needle with a hole though it. And the chamber may be a bit loose so don't FLS.