what jump for 139 scenars

[mattp8893]

just trying to get an idea for what these bullets seems to like for when mine get here this week. how much are yall jumping yours in 6.5 cm.

 

[padom]

.02" off lands but they are not seating sensitive at all

Here's my seating depth test target

 

[Pvt.Donut]

Similar results to what padom has above. Not particularly seating depth sensitive. 0.09" jump seems to group it slightly better than shorter or longer than that.

 

[mojavejim]

.020 I've found best for accuracy with good ES

 

[mattp8893]

good deal thanks guys. guess ill try a few differences and as long as they do ok order up some more

 

[Tomo999]

I've got a bunch of Lapua 139 Scenars to test out this weekend at various powder weights from 39gr to 42.4gr (H4350) as well as seating depths of 20, 10, 3thou and touch lands. I'll post up the results if people are interested.

 

[jarhead1077]

Please post your results Tomo999. I would be very much interested trying to establish load with my 260 Rem using H54350 and Lapua Brass with Scenar 139.

 

[Supersubes]

Probably one of the more forgiving bullets around with regard to seating depth. Ive shot probably 6k of them. Mine were always 20 to 30 thou off. I wouldnt fret over it to much.

 

[mikehotel]

0.020 to 0.025 off

 

[gilgamesh1]

0.010 probably a little more now, but haven't checked recently

 

[Tomo999]

I won't bother posting a full range report (unless people want to see one) instead here's a summary of yesterday's test.

Gen 1 Ruger Precision Rifle 6.5CM: round count 150.
Magnetospeed V3 chrono.

Best results:

Lapua 139g Scenar bullet
Lapua s/r case
H4350 powder

3 shot groups - best results:

41.8gr H4350
3 thou off the lands
SD: 2
ES: 5
average FPS: 2685fps

42gr H4350
3 thou off lands
SD: 2
ES: 4
average FPS: 2711fps

42gr H4350
10 thou off lands
SD: 3
ES: 7
average FPS: 2711fps

42.4gr H4350
10 thou off the lands
SD: 2
ES: 5
average FPS: 2730fps

4 shot group
41.6gr H4350
touching lands
SD: 4
ES: 10
average FPS: 2695