Long range load development at 100 yards.

[johara1]

I don't want to rain on your parade but with the 105H at 100 the groups were -.1 with 33+ of reloader 15.I never did well with 108's or Varget. Are you using wind flags?……. jim

 

[lawrence97]

Not sure what's going on! ES looks good and all seems consistent except for group size. Bullets are sorted and 450's seem common for dashers. I also thought my scope was loose but not the case. Action is torqued properly and started on a clean barrel with approx. 750 rounds. I will test going from jump into the lands to see if things tighten up. I do have some hybrids on the way but that is a week away!

 

[lawrence97]

Jim, no flags. I shot early morning and there was no wind or mirage. I do have hybrids on the way. Will varget work with the hybrids? Because I cannot find any reloaded 15.
The groups were shot at 200 yards and the smallest measured from 1/2 to 3/4 of an inch and I agree, it should be shooting a lot tighter!

 

[Erik Cortina]

Did some testing with a 6 Dasher with a 28" barrel. I used Varget, CCI 450 primers and Berger 108 BT bullets. I conducted a powder and seating depth test. I picked 32.5 as my powder charge, but if you think that there is a better option, let me know what you think!

6mm Dasher? What are you smoking?

I agree, nothing jumps out at me. Try different primers and see if it settles down.

 

[6BRinNZ]

I shot reasonable scores as the wind was mild between 1.5 - 4 moa right. Vertical was pretty bad though.
My gut feeling is that it will lock into place - seating the bullets in the cases I would say the neck tension is way too light to get a consistent burn...its a bugger my chrony is on the blink as I suspect that would confirm. I'm not too worried as this isn't the final load - and to be on and reasonably competitive with a new calibre and rifle after three load dev trips (one of which was to simply get on paper) is pretty good.

Recoil was pretty consistent where I ended up in the top left of the frame - say 80% of the time, a push forward and I was back on.

Having said all of this - I shot reasonable scores leaking one into a 9 and an 8 in my first relay and 5 on my second relay, two of which were due to vertical.

Got up to the range today and put my load over the chrony. Chrony confirms that my vertical is due to the numbers, which were shocking.

Also out of interest my avg FPS for 44.1 of ADI 2208 and 185 Hybrid in a Lapua case is only 2602.

After this weekend I have 200 rounds of once fired brass so I will start load dev again with that.

Erik - I guess set tuner to zero and go up in .5 grain increments again?

 

[Erik Cortina]

Yes, put tuner on 0 and start over. Good luck.

 

[lawrence97]

Can't find any 180 hybrids so I had to dust off my tube gun dasher. Berger 6mm's are easier to find and cheaper to use for maintaining proficiency. I don't remember it shooting a shotgun pattern like it's currently shooting but I will try some different primers.

 

[johara1]

See if you can find some Berger 105 VLD's,i know some that had very good luck with them. See if you can get some H4895,i found it to be the next best to RL-15, maybe i should say as good as RL-15. A dasher will shoot in a .1 at 100,don't wear out a barrel at mid range, stick to 100 with flags make sure you shoot under the same conditions for testing……. jim

 

[Erik Cortina]

I agree with johara1 about shooting at 100 yards, hence the thread.

 

[johara1]

Erik, Maybe we agree on something…… LOL.. ….. jim

 

[Biggdawg]

I said i would report back so here is what i came up with.

my test with rl22 failed the second test -- temps came up which caused sticky bolt -- was pushing on upper limit and rl22 just isn't temp stabil. So i changed to H1000 re ran the test here are the pics

300 wm 200LRX H1000 74gn
Series 2 Shots: 3
Min 2881 Max 2905
Avg 2892 S-D 12
ES 24

Series Shot Speed
2 1 2905 ft/sec
2 2 2881 ft/sec
2 3 2891 ft/sec
---- ---- ---- ----
300 wm 200LRX H1000 75.5gn
this is the load
Series 3 Shots: 3
Min 2948 Max 2955
Avg 2950 S-D 3
ES 7

Series Shot Speed
3 1 2948 ft/sec
3 2 2949 ft/sec
3 3 2955 ft/sec
---- ---- ---- ----



on this target the bottom group on the left poa was top dot but i didn't reset scope after installing my new trigger. i adjusted 8 mil clicks up after the group. i compared it and it had similar poi as the rest. so then i shot the 74 grain load at the top left dot.





I was torn on which one to use so i loaded 9 rounds of 74gn and 9 rounds of 75.5 grains then shot 2 3 shot groups of each then installed my magnetospeed chrono to check velocity on the last 3 of each. -- the magnetospeed chrono shifted my poi up 6" and effected the 74gn load more than the 75.5.





so looks like the 75.5 wins out at 2950 fps average for 3 shots with es of 12 since it is a hunting rifle and time is short not going to run a seat test the bullets are expensive also

thanks again to all those that help out in this thread.

 

[Raythemanroe]

73 looks like the least vertical and seating depth would be worth testing.


Ray

 

[Biggdawg]

the 73 is actually 74 i swapped them on the target because my scope was off on the first group.

that is why i tested the 74 and 75.5 but on the second test the 75 seems better i could be wrong new at this game.

will consider the seating test after i finish the load for my second gun -- these load are for my african safari in 35 days -- if there is enuff time for it and for practice
thanks

 

[13red56]

Personally I would be inclined to work on the 74 gr group. Yea the 75.5 shot one smaller group and then shot a group similar to the 74 and was vertical. The 74 only had horizontal in both groups is why I would pic over the 75.5. What were the ES and SD on 74

 

[Biggdawg]

Personally I would be inclined to work on the 74 gr group. Yea the 75.5 shot one smaller group and then shot a group similar to the 74 and was vertical. The 74 only had horizontal in both groups is why I would pic over the 75.5. What were the ES and SD on 74

ok Thank you will run the seat test on the 74, don't have the es/sd with me right now will report back tonight.

 

[Raythemanroe]

Personally I would be inclined to work on the 74 gr group. Yea the 75.5 shot one smaller group and then shot a group similar to the 74 and was vertical. The 74 only had horizontal in both groups is why I would pic over the 75.5. What were the ES and SD on 74

ok Thank you will run the seat test on the 74, don't have the es/sd with me right now will report back tonight.

Off topic a bit but what bullet weight and type you using for the trip...Oh and good luck on your trip


Ray

 

[Biggdawg]

Personally I would be inclined to work on the 74 gr group. Yea the 75.5 shot one smaller group and then shot a group similar to the 74 and was vertical. The 74 only had horizontal in both groups is why I would pic over the 75.5. What were the ES and SD on 74

ok Thank you will run the seat test on the 74, don't have the es/sd with me right now will report back tonight.

Off topic a bit but what bullet weight and type you using for the trip...Oh and good luck on your trip


Ray

my 300 win mag is the 200gn barnes lrx and my 6.5-284 norma is going to be the woodleigh 140 protected tip

 

[lawrence97]

I torqued everything I could and I did not find anything that was wrong mechanically. I tried another seating depth test with the dasher. It looks like it prefers to stay closer to the lands. Sorry for posting my 200 yd groups but the area closest to me for testing is perfect for 200 yards but if I try to do 100 yards I would be shooting up a hill. The only other 100yd - 1000 yd range is a 30min drive…. comments welcomed.

 

[Biggdawg]

Personally I would be inclined to work on the 74 gr group. Yea the 75.5 shot one smaller group and then shot a group similar to the 74 and was vertical. The 74 only had horizontal in both groups is why I would pic over the 75.5. What were the ES and SD on 74

here is the chrono data from the testing on the 74 and 75.5 loads

300 wm 200LRX H1000 74gn
Series 2 Shots: 3
Min 2881 Max 2905
Avg 2892 S-D 12
ES 24

Series Shot Speed
2 1 2905 ft/sec
2 2 2881 ft/sec
2 3 2891 ft/sec
---- ---- ---- ----
300 wm 200LRX H1000 75.5gn
this is the load
Series 3 Shots: 3
Min 2948 Max 2955
Avg 2950 S-D 3
ES 7

Series Shot Speed
3 1 2948 ft/sec
3 2 2949 ft/sec
3 3 2955 ft/sec
---- ---- ---- ----

 

[Biggdawg]

I took the advise of you guys and did a seat depth test with the 74gn h1000 lrx 200 300 win mag, stock 700 adl

all groups were shot with a 8 - 9 minute cool down between groups chrono check after showed 2868 av fps.

So which depth looks best? i am thinking 2.858 am i right? thanks again