147gr Workup

[seasprite]

Started a new load today since the weather was nice today (I thought of you today  imschur ) and I had to get some trigger time. My goal with this is a plinking load with mixed brass. The components are Winchester primers, CFE223 powder, 147gr pull downs and mixed cases.

Starting charge was 48.4gr ending was 50.8gr. Book values were starting 48.4 and max of 51.5gr. Since this is going in mixed cases I new I wasn't going for max so 50.8 as far as I loaded test rounds to. My col was around 2.820 but those of you who have loaded these pull downs know they are pretty inconsistent so if they fit in the mag they were good to go.

Took the chrony with me today but the results were not what I expected  <dontknow> it was cloudy today so that might be why. here's my averages with ES and SD's

powder    fps        es    sd

48.4      2599      29    15

48.7        no test

49.0      2582      8      4

49.3      2603      26    14

49.6      2600      46    23

49.9      2623      15    7

50.2      2579      7      3

50.5      2595      64    35

50.8      no test

I was figuring my velocities should have ended at about 2700 fps with this powder and 16" barrel especially since I'm getting 2650 fps with my 168's. Well If I was to ignore the chrony data and go off of my targets its still going to at 50.0gr charge. So here's the target pics. and I await your comments <thumbsup>.

[unforgiven]

Taking in you'r info brother,I like what you'r doing <thumbsup>

[survivalshop]

If there is not much difference in grouping , go with the 49 grains , on less grain of powder & same ES & SD .

[seasprite]

If there is not much difference in grouping , go with the 49 grains , on less grain of powder & same ES & SD .

The 49gr is scattered a lot more than the 49.9gr. The charge weights right before and right after the 49.9 weight seem to have the same relative point of impact even though there more spread out, gives me the impression that this weight might be the most forgiving.

I've labeled my cases for the seating depth test now just got to load them up. My range is 2.775"-2.820" five rounds each. My guess is that should hit a node before getting down to the 2.775" depth then I'll pull the rest. 

[seasprite]

Well I,m done loading up my seating depth test loads  <thumbsup> Now I just need a nice day to go out and test them. I also decided to play with a new tool that I have, an Hornady comparator although on the 147gr  pull downs aren't exactly match bullets I figured it help me when I work on the 178gr A-max load. 

[unforgiven]

Nice bro  <thumbsup>

[seasprite]

I managed to get my seating depth test done before the rains moved in it was kinda touch and go with Chronograph today started to sprinkle and I thought I was going to have to put it up but wouldn't be able to until the range officer called a cold range.

It looks like 2.800" is what my gun likes with load but I'm need an opinion on what I should do <dontknow> I took measurements with an comparitor and I like what I see with the 2.210" but going with that means higher ES & SD numbers. So here's the pics and tell me what you guy's would choose? 

[seasprite]

I figure I better update this thread with what I decided on so here is the final recipe for this load workup.

 

147gr pull downs

Remington brass and nato brass

Tula LR primers

CFE 223 powder

C.O.L. with Horndy comp. 2.10"

powder charge: Rem brass 49.9 gr

                          Nato brass 49.2 gr

 

Med. to heavy crimp