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Anyone use IMR4955 with 180, 200 & 220 grain bullets in the 300 WBY?
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Campfire Kahuna
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Campfire Kahuna
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In my experience IMR7977 works better. But whatever....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Thanks MD.
I have good groups and velocity with H1000 and 180 grain Partitions. Good results with RE26 and 200 gr Partitions. (Both ~ 1MOA or less -4 shot groups.) For some reason my 700 does not like 200 grain Accubonds - 4 MOA, best so far -3 shot groups. (My WBY is a 700 Classic). I’ve tried most of the loads in the Gack book. My 700 probably doesn’t have the free-Bore as the WBY barrels. One load in the Gack book got excellent groups but seemed a little too warm in the 700.
I’ve ordered more 200 grain Partitions and have plenty of RE26. But I wanted to explore other possibilities. And I have no idea how you have gotten good groups with the 220 grain Hornady bullets.
I’ll get some IMR7977.
I bought a second 300 WBY. I have not received it yet. Everyone knows that animals a fellow shoots with heavy Partitions in a 300 WBY require sub MOA groups.
Last edited by Bugger; 07/30/19.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Campfire 'Bwana
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Campfire 'Bwana
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A factory 700 will have a SAAMI chamber, so it will have at least the minimum freebore length specified for the 300 Weatherby.
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I was under the impression that free bore or distance to the rifling varied by manufacturer.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Campfire 'Bwana
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A manufacturer like Remington will adhere to the SAAMI spec so any in spec factory ammunition may be used safely. Weatherby factory ammo will be too hot in a zero freebore chamber.
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Yep. But I didn’t think freebore was part of SAAMI.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Ok.
I thought that Weatherby has reduced the free-bore in their rifles from their original design.
Is that true?
If so, which is the standard?
If so, has SAAMI shown the decreased free-Bore?
That drawing shows a 1 degree 2 minute slope, I didn’t see a maximum length of the straight portion? I guess that’s the rifled bore and the length of the free bore is dependent on the slope and the two end diameters.
Last edited by Bugger; 07/30/19.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Bugger,
Care to share the details of the 200 Partition/RL26 load?
“Factio democratica delenda est"
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I've run 150's to 208's in a Sako 300 Bee, all right at or sub 1 MOA with using either RL-22 and RL-25 for five shots (when I didn't mind the recoil). The powder could have been I4350 or H870.
Like you stated on sub MOA, (a bit facetiously), your RL-26 loads are probably doing just fine and if you need to try five different powders you're probably not going to find a one-holer but once in 500 tries....and it won't be repeated in a factory rifle or with a human shoulder behind it.
I once had A 7 shot group from a factory 338 that measured .765. I quit at seven because I knew I'd jack it up. It used Sierra 215's at 2,985 fps.. It shot so good I pretty much wound up shooting game with 250 Partitions and PT Golds and 230 FailSafes.........
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78.2 grains RE 26, 215 primers, 3.69” LOA, 200 grain new Partitions.
.95” 4 shot group, round in shape.
PS: I have on hand 3 different styles of 180 grain Partitions. I suspect that the 200 grain bullets went through the same “improvements”.
Also 83 grain H1000, 215 primers, 180 grain new Partitions .8” group - horizontal dispersion - no measurable verticals dispersion.
Last edited by Bugger; 07/31/19.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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MD
Just curious, your chapter in the 300 WBY in Gack. You stated, I believe, that you had three 300 WBY’s. I think you had a very early WBY built on a Mauser action, correct? Which rifle(s) did you use for your loads? Did you notice a difference in “free bore length” with your rifles?
Thanks.
PS: The 200 grain Partition is likely the bullet I’ll be using for the same reasons you stated in that chapter.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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78.2 grains RE 26, 215 primers, 3.69” LOA, 200 grain new Partitions.
.95” 4 shot group, round in shape.
PS: I have on hand 3 different styles of 180 grain Partitions. I suspect that the 200 grain bullets went through the same “improvements”.
Also 83 grain H1000, 215 primers, 180 grain new Partitions .8” group - horizontal dispersion - no measurable verticals dispersion. Thank you. Have you had a chance to run those over a chronograph?
“Factio democratica delenda est"
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Campfire Kahuna
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Campfire Kahuna
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Bugger,
Yes, I owned a mid-1950's Weatherby, one of the first "production" rifles based on the FN 98 action. Its throat was very similar to those in the later .300 Weatherbys I owned.
There's no reason for Weatherby to change the originally developed "freebore," and as somebody else has already mentioned, a good reason not to. It's been standardized for a long time.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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I've run 150's to 208's in a Sako 300 Bee, all right at or sub 1 MOA with using either RL-22 and RL-25 for five shots (when I didn't mind the recoil). The powder could have been I4350 or H870.
Like you stated on sub MOA, (a bit facetiously), your RL-26 loads are probably doing just fine and if you need to try five different powders you're probably not going to find a one-holer but once in 500 tries....and it won't be repeated in a factory rifle or with a human shoulder behind it.
I once had A 7 shot group from a factory 338 that measured .765. I quit at seven because I knew I'd jack it up. It used Sierra 215's at 2,985 fps.. It shot so good I pretty much wound up shooting game with 250 Partitions and PT Golds and 230 FailSafes......... My most accurate load I tried in my 338’s was with 250 grain Partitions and H4831/H4831sc, that was my go-to elk rifle/load. My last 338 - a classic model 70 seemed to kick harder than the others (age had nothing to do with it!!!🙄) and I thought that I could get by, by going smaller. Now I’m wringing our my 300 Win Mag and 300 WBY’s - all Remington 700’s.
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Campfire Ranger
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Pure and simple, a 300 WBY will push a 180 grain NBT or Accubond at 3200 FPS with 7828 powder and kill anything you point it at. 7828 is a great powder for accuracy and velocity, forget anything else you hear about what works best as nothing will work better...
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Nyrifleman
As I recall both loads were close to 3,000 fps
I prefer classic. Semper Fi I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Campfire 'Bwana
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Campfire 'Bwana
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I've used MRP/RL22 since day one back in the 80s, because the old Weatherby Guide had a reloading section in the back with a "factory equivalent load" and that is what I use. 80.5gr, F-215s gave be right at 3200 and half MOA. I also had good luck with 7828, but my mainstay remains the former. Over 17 head of African game, one elk, black bear, LOTS of hogs. I used 180 Partitions way back when but have since switched to TTSXs 180s.
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Campfire Ranger
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Here you go. 3280 ft per second 180 gr accubond. Please disregard the fouling shot. 82 gr 7828.
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