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+---- Thread: New lot of OE (/thread-1517.html)
New lot of OE - Kurt - 08-28-2015
I just had to break into a new case of 2F OE and it is a new lot E2-05/14MY06B.
My old lot of OE E1-01/13FE28B was giving my new .44-75 nothing larger then 3-1/2" @ 200 yards. Many 4 shot sub MOA groups, many.
Well I used the last can and opened a new case and checked the lot# and it's a new batch. Loaded a ladder load again. A load that was giving me group as small as 3/4" with the old lot @ 200 well that group opened up to 4-1/2" using this new lot.
Using ladder loads of two different bullets and loads nothing was smaller then 3.5" @ 200. Have any of you used the new lot? if so what did you find?
Back to the drawing board!!! have a week before Lodi
Kurt
RE: New lot of OE - rdnck - 08-28-2015
Oh boy-- I feel for you. Shoot straight, rdnck.
RE: New lot of OE - Don McDowell - 08-28-2015
Did you have chrono numbers on the other lot? How about a volume measure, what is the weight difference in a volume measured charge of the two lots.
Forearm screws didn't get to loose, or the scope mounts loosen up, brass need annealing?
RE: New lot of OE - Kurt - 08-29-2015
Don,
No scope on the rifle.
Yes checked screws at the range after the second group fired.
No Chrono used. I don't use one to often. Only when I want a BC reading then I set up two. The target usually gives me more info I need.
Yes checked case volume. The case holds 93.1 grains drop tubed with the old lot. 93.7 gr of the new lot. The 6/10's could be the way the powder settled by the angle of the tube.
Brass has been annealed four firings ago.
Don with the old lot the extreme vertical I got @ 200 yds was from flat line to 2-1/4" the most over the whole spread of ladder loads from zero compression to .250" Now these same loads have opened the groups to over 4"
I was hoping some here have used some of the new 2F lot.
Kurt
RE: New lot of OE - Don McDowell - 08-29-2015
That's why I was wondering about Chrono readings. Then a person could possibly adjust the charge up or down to match the velocity.
Was there a difference in sight settings?
The forearm screws on the Raton gun came loose last weekend and opened groups up. Tightened them up and along came the groups..
RE: New lot of OE - Kurt - 08-29-2015
Don. When I do my ladder load work I use a full sized 42" SR target. I start at center target shoot the group. Make notes what that load is then I raise the elevation 5 MOA and shoot the second different load group. then down 5 MOA and so on around the target. This keeps all loads on one target for easy evaluation.
Yes the screws working loose does make a difference. Especially the tang screws on actions like the Stevens where the screws are just in the wood with out a through bolt or screws going through the wood holding both upper and lower tangs.
Fore arm wood is not making contact with the action.
There is just to much of a change in this shooting in the same light and weather conditions that I have shot in this week. Same winds/none. temp and humidity.
Kurt
RE: New lot of OE - Don McDowell - 08-29-2015
I guess what I'm curious about is the sight setting the same for the 1st group on target with both lots of powder, or did you have to adjust to get to the centerx before you made the other adjustments? That would be some indication of velocity difference, as the atmospheric conditions were the same as previous.
RE: New lot of OE - Don McDowell - 08-29-2015
I'm trying to figure out if the new lot is slower or faster than the old lot you had.
RE: New lot of OE - Don McDowell - 08-29-2015
One more thing you might take a look at. If you're using this latest run of scrapline brass, check your firing pin hole in the breechblock. We saw this problem jump up last week at Byers, things went to pot for a fella on the 900, I mean everything fell plumb fat. But there was some scraping evidenced on the case heads and primers. There was enough stuff scraped into the firing pin bushing to impede it, and it was acting like a broken firing pin. Took the firing pin out and cleaned the mess up, and things regrouped nicely at 1000 yds, and all was very well the next day at midrange.
I have a lot of problems with high primers using this latest lot of scrapline brass for the 44-90, due to the very inconsistent primer pocket depth.
RE: New lot of OE - Kurt - 08-29-2015
(08-29-2015, 11:07 AM)Don McDowell Wrote: I guess what I'm curious about is the sight setting the same for the 1st group on target with both lots of powder, or did you have to adjust to get to the centerx before you made the other adjustments? That would be some indication of velocity difference, as the atmospheric conditions were the same as previous.
Oh. OK the sight setting for center is 40 Pt. elevation, zero wind setting on this rifle.
I had my 4 shot accuracy load with the old lot. I shot it several times over the weeks shooting it was never larger then 3/4 vertical 2-1/4 horizontal. I shot that group several times during the week.
I started with this load yesterday with the new lot just for trigger time at the range and I shot four five shot groups and they were all the same around 4".
Last night I was going to load 120 rounds for Lodi using the old lot but it turns out The powder left in the magazine was 3F and some 1.5 OE and 1.5 KIK. This leaves me with a 1/2 can of the old 2F OE and I don't have any loads for the powder I have. Time is getting short for next weekends match to get a load worked up. The 1.5 KIK has shot well in the .44-100 Rem ST so I will use it in the .44-75 with a reduced load of the same compression and head to the range as soon as the rain lets up a little.
Kurt