It has been close to nine months ago I was asking questions on twist rate for stabilizing a 180 Berger VLD in a 7mm tube. I ended up getting a 30" 1 in 7, #7 profile, 3 groove SS Lilja. I was warned that this combo of 3 groove and the fast twist could end up ruining bullets at approx 200 rnds. I am happy to say perhaps the choice of chambering kept any problems from happening. Now have 230 rnds through barrel and no sign of bullet damage.
Details: You know the barrel...chambered in 7 Rem Mag with reamer made by Dave Kiff to my specs. It is a no turn neck with the throat moved out a bit to capitalize on the long magazine and bolt throw of a 375 H and H Mark X action. It has a brown/black Joel Russo stock. Lawson co in Tucson did all the gunsmithing. Trigger set at 1 lb. Scope is a 8.5-25 x 50 LR with target turrets and varmint reticle. (it was on sale as a closeout, the last of the VX IIIs) I was very lucky to find that SOMEONE had a picatinny rail for this mauser clone. Near Mfg supplied me with the 20 MOA rail. I chose the Burris extreme rings. Weight is 13 lb 13 oz empty with no sling or bi-pod.
Load data. Used RL-25, win brass, fed 215 match primers and the 180 Berger hunting VLD seating depth was .035" into rifling.
. Also tried some heavy jacketed target VLDs which shot the same with approx 35 fps more velocity. Load was worked up to 69 grains when I had the rifle in a funky mauser stock waiting for the Russo stock. It shot ragged holes at 100 yds with a velocity of 3100 fps. When the Russo stock was bedded to the action more barrel shank was included in the bedding and the 69 gr load didn't shoot as well.
Reworked the load backing down to 68 grs. Then tried seating the bullet a bit further away from the rifling in .005" increments. Best grouping was with the VLD .025" into rifling. Velocity is now 3055 fps at 55 degrees. It climbs up to 3125 or so in 85 degree temps but still shoots great.
This load is very consistent and has shot the same POI for 10 sessions. Moved out to 200 yds and it shoots groups very similar in size to the ones at 100 yds. It is joy to shoot and will be my go to rifle for the coues wt hunt this friday Nov 6.
I devoted my last four sessions to familarizing its characteristics with a harris bipod and a small rear sandbag. It is shooting 1/4 MOA at 200 yds if I do my part.
I'll report back on how it works in the field.