Load Data - 340 WBY

Garrett said:

I would like to use 300 grn sierra load with retumbo for the 340

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Send me a PM to remind me and I will send it out this evening. Scotty

beretzs said:

If you would like more accurate data, for a specific powder, weigh a FIRED, empty case from your rifle, then fill that same case with water, all the way till it will not hold anymore. Weigh that. Give me the difference, that is the overall case capacity in water. That can be used to give a more accurate charge recommendation with QL. Running the program only takes a few seconds, so if you need something specific hit me up, happy to assist. Scotty

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I finally got the gun and was able to fire some test loads. I've posted that data in this thread. I appreciate the offer to run some data through QL - the H2O capacity is 104.3 gr (empty = 225.3, full = 329.9).

I look forward to the results. Thanks.

I have just started reloading for a new Weatherby Mark V 340 Weatherby with 26" barrel. My first sighting-in loads were with 250 Barnes TSX FB (3.660 COAL) and 250 Swift A Frame (3.620 COAL). Powder was Reloader 22 and charge weights were 83-85g. Was still getting familiar with the rifle so was not shooting for best group accuracy. Once sighed in was practicing on clay pidgeons at 100 yards and was hitting them well.

Put a 2-7x33mm Leupold VX-R firedot scope on it. Working up loads and practice for shots up to 100 yards in prep for a fall 2014 coastal brown bear hunt.

Powerguy said:

I have just started reloading for a new Weatherby Mark V 340 Weatherby with 26" barrel. My first sighting-in loads were with 250 Barnes TSX FB (3.660 COAL) and 250 Swift A Frame (3.620 COAL). Powder was Reloader 22 and charge weights were 83-85g. Was still getting familiar with the rifle so was not shooting for best group accuracy. Once sighed in was practicing on clay pidgeons at 100 yards and was hitting them well.

Put a 2-7x33mm Leupold VX-R firedot scope on it. Working up loads and practice for shots up to 100 yards in prep for a fall 2014 coastal brown bear hunt.

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That sounds like some great loads and what a great sounding bear rifle set up. I imagine you'll hammer about any bear walking with either of those combos.

I recently acquired a mark v stainless muzzlebrake. Not fluted. I am going to try to hone in on the factory specifications or the 225 bonded. I dropped a 340 inch bull elk in his tracks. Not a step. At 286yds. Load is moa out of factory box. No custom enhancements to gun. No trigger no extra bedding no lapping etc. Never seen anything like this on an animal of this size. I have a Schmidt and bender PMII I'm gonna put on it. Work a consistent load similar to out of box. And think with some work it is a one hole gun of a bench at 150yds maybe 200. A lot of folks swear by a heavier bullet. But accuracy is always my thoughts 225 or. 275 is effective on anything in north America what shoots best? Will update my findings in fall will be working on this summer.

It's been a while and I've done a bit of bench work but not satisfied with my accuracy. It's hovering at 1-1/2 moa. I've tried RL-19, RL-22, 7828ssc, and Win 760. Bullets at 265 and 285 gr.

Does anybody have load data for RL-33? Being developed for large magnums, it has some potential. They post data for the 300 WBY and 338 Lapua. I can extrapolate, but would prefer otherwise. Any help will be greatly appreciated.

I got a question has anyone used n560 with a 210gr barnes, my rifle why I don't know will not shoot a group of any untill I shoot a neck sized brass with the 210 ttsx I get sub moa accuratzey, it simply will not shoot a 200gr spire point or 250gr ,

majestrate98 said:

It's been a while and I've done a bit of bench work but not satisfied with my accuracy. It's hovering at 1-1/2 moa. I've tried RL-19, RL-22, 7828ssc, and Win 760. Bullets at 265 and 285 gr.

Does anybody have load data for RL-33? Being developed for large magnums, it has some potential. They post data for the 300 WBY and 338 Lapua. I can extrapolate, but would prefer otherwise. Any help will be greatly appreciated.

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I've used r33 in 30378 with 165 gr horaday spire point had great success I d try r23 or 22 or map in a 300weatherby