Range Day - .378Wby

Got out to the range yesterday with my Japanese Euromark and it is starting to show promise.

300gr PT over 109-113grs 7828

260gr AB over 109-113grs H4831

It does show potential.

That's a LOT of cartridge...

Yes, no brake and a wee bit snappy off the bench...lol

mine is the same way. No brake Lazermark. What were your velocities?

Also what are you going to try next? Different powders, bullets, seating depth etc?

Didn't bring my chrony unfortunately. I am thinking of trying RL22 next.

Did you try the whole range of the loads listed Example: 109-113grs 7828 for the 300 PT? If so were these your best groups?

With +110grain imr7828 I figure it's +3000 ft/sec. With 113grain imr 7828 the 300grain projectile get's close to 3050 ft/sec. These is my guesses.
The .378Bee is a spectacular cartridge in every way. Some say it does come with a price with this kind of ballistics....often recoil is what the shooter mentions. However squeezing that trigger gives more than a pop concert. That thing is a rockstar!!.

Mine did 3065 with 113 7828 and 3080 with 115 RL25----300 gr

I shot the 109 and the 113 loads and skipped the 111.

so the load you shot that is showing with the 260 and the 300. is......................

Both are the 113gr loads.

best groups?



My Japanese lasermark just came back from WBY cause the original owner freefloated it. They fixed it back to original. Can not wait to take her out!

Yes, these are the best so far. I want to try some different loads and see if things improve before I look at any bedding issues. I torqued the action screws to 35 lb/inch.

With wood 35 ft/lbs with reinforced plastic, 45 foot pounds

Try the 250 TTSX also. I got 3200 fps with it.