7 LRM load data

S-mac

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Joined
May 4, 2020
Messages
6
Location
New Zealand
First of all, hi guys!

I just rechambered a Tikka T3x superlight in 7 LRM and need some help with some load data.

can anyone give me some data for RL 22, RL26 and or RL33 and 180gr ELDM.
Any help would be appreciated
 
Here is info on load work ups for my rebarrelled 7LRM. Original barrel which lasted about 1200 rounds liked the 180gr Berger Hybrid best. Load was 69.7g H1000 @ 2962fps - 3.413" OAL. Would hold <0.5MOA out to 1000yds, until it didn't.

Data posted in 2 sets: Ladder during first 150 rounds, Final OCW after barrel sped up ~70fps

New Barrel - Proof 1:8, 26"
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: H1000
OAL: 3.390" = 0.025" from lands
Charge (gr)ELDM's
69.42966
69.62958
69.82960
70.02985
70.22972
70.42991
 
My best 7LRM load
image.jpeg
 
Barrel after 150 rounds*****
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: H1000
OAL: 3.390" = 0.025" from lands
6 shots @ each charge weight
ChargeAvg
69.62998
69.73009
69.83004
69.93018


Ladder with RL26******************************************************************************
***********************************************************************************************
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: RL26
OAL: 3.390" = 0.025" from lands
3 shots @ each charge weight
Charge (gr)Round 1
65.42894
65.72917
66.02916
66.32924
66.62929
66.92959
67.22944
67.52959
67.82979
68.12988
68.43010
68.73012
69.03040

***********************************************************************************************
Landed on a load for the ELD-M's with H1000 @ 69.7gr, saving RL-26 for my PRC's.
Performed 2seating depth tests @ 200yds, averaged data below
***********************************************************************************************
OALRTOJumpAverageMOA
3.4002.6650.0053005.6671.5
3.3902.6550.01530000.21
3.3802.6450.02529950.4
3.3702.6350.03529871.09
3.3602.6250.04529900.75

I ended up settling on 3.385" OAL (0.020" jump) with the ELDM's, averaging 2997fps. Shot steel out to 1000yds last weekend - perfect!
 
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