02-01-2020, 02:41 AM
grayfox Wrote:Well, first I needed to zero the new scope I put on.... forgot about that :/
Then the chrono work began. Mostly a scoping type of shot groups, 3 each.
Narrowing in will come later.
From my previous bolt-action and within book limits I chose some loads that ought to be ok...
that is, for my gun, ymmv.
129 SST, Hornady brass with cci450, coal set to 2.285. The mags will fit 2.293-2.295.
129 Ablr's, Hornady brass with cci450 again.
I used CFE 223, at 30.4, 30.7, and 31.0 grs. No crunching felt. No hard bolt lifts, no pressure signs.
Also shot some Hdy 123 sst's, 123 eldm (Hdy Black) and Federal Tnt 90's, all factory.
This barrel is kind of fast. Which is nice. It's resting in the Mdt AR-mag-well chassis for Grendel, and a 4-14x44 PA ffp scope on top.
I do like this RAP.
123 Sst custom: 2568 sd-15.5
123 Hdy Blk Eldm: 2544, sd-24.8
90 Tnt Federals: 2970, sd-21. This 2970 is 70-100 ft/s faster than any of the 20" bbls I've owned.
Now 129 Sst handloads:
30.4 gr: 2488, sd-14.7
30.7 gr: 2514, sd-8.6
31.0 gr: 2543, sd-15.6
129 Ablr handloads:
30.4 gr: 2477, sd-16.5
30.7 gr: 2497, sd-8.6
31.0 gr: 2516, sd-13.7
Both 129's shot nicely, I think I'll concentrate on the vicinity of 30.6-.7-.8 for both of them. (But will also be feeding 123's, maybe my 100 ttsx's)
The Ablr is of course a premium bullet and nice 0.530 BC, but the Sst is not bad, more economical and still 0.495.
At 2500 ft/s or so I will have plenty of range for what I might shoot this one.
Feeding was acceptable, only 1 FiTF (my new term, "fiddle to feed") and 1 Ftf out of ~35 rounds and 2 mags (the Cpd-dura mags).
Did I mention that I like this RAP?
Looks good gray.
That 31 grain charge and velocity is close to what I got with cfe223 and the 129 ablr in the howa I had. It just keep falling apart on me with a 20 degree temp change.
Liking the h4895 powder much better, my CZ loves that bullet being pushed by h4895. I'm working at 2.300 length but have a tinny bit of room leavt in the mag I work up and down a bit to try and dress it up some.
If you have some h4895 you might be surprised with it. I seen some data on Johnny' s reloading with 129 ablr and ar-comp.
I might give it a try but that load I worked up with h4895 is very nice.