The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Gunsmithing Take down 375 & 300 H&H adviseGo | New | Find | Notify | Tools | Reply | |
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I considering a project being a take down with two calibers 375 and 300 H&H. My first concern is with feeding . This will on a GMA mag. action.Mike Roden says no problem but then he makes the action.I am going to use the old Rigby style latch with the plunger. But, like I said, my first concern is reliable feeding if it isn't reliable its a waste of time and a lot of money. I think Duane could best advise me as he is the feeding guru. Any help or advise would be seriously appreciated. | ||
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I don't know if this helps but pre 64 Win 70's used the same receiver, magazine box and follower for 375 and 300 H&H. They feed plenty smooth using the same components. PA Bear Hunter, NRA Benefactor | |||
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I'm no gunsmith but: a. They are same cartridge with different dia necks (375 reduced to 308) b. just had a MK X 375 H&H converted to 300 H&H, only work was reaming a 30-06 take-off barrel to 300 H&H I think they are the perfect pair Jim fur, feathers, & meat in the freezer  "Pass it on to your kids" | |||
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Well the head size and length are the same but the 300 has more body taper which might require a different rail set up.Not going to start it unless I'm reasonably confident it will work. Just wanted to know if some one has had experience with such a deal.I am thinking it would be a classic one gun combo to take to Africa.I know take downs are reputed to be not as accurate as a one piece but the majority of shots I have taken in Africa have been under 100 yards and didn't require cutting edge accuracy. | |||
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Thanks form your input ABOB. If it worked in your switch from the 375 to the 300 on a Mark X then it shouId work in the GMA. Same reasoning for the Model 70.I guess I'm just paranoid about feeding especially when it envolves a potentially dangerous game caliber. | |||
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The 300 and 375 H&H have the reputation of being very slick feeders. There is not much difference between the two cases and it should not be a problem to get them to work in the same action. Just the same, I will try to run some 300 H&H cartridges through my 375 (FN 98) tomorrow. I will let you know how it works. Jason "You're not hard-core, unless you live hard-core." _______________________ Hunting in Africa is an adventure. The number of variables involved preclude the possibility of a perfect hunt. Some problems will arise. How you decide to handle them will determine how much you enjoy your hunt. Just tell yourself, "it's all part of the adventure." Remember, if Robert Ruark had gotten upset every time problems with Harry Selby's flat bed truck delayed the safari, Horn of the Hunter would have read like an indictment of Selby. But Ruark rolled with the punches, poured some gin, and enjoyed the adventure. -Jason Brown | |||
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J brown really appreciate your help.I had thought of doing the same. I have a 375 and can rustle up some 300 round and give it a try myself as well when i get home from the northwest territories. I have the left hand Fred Wells on custom guns under " dogribs project" This action is basically identical to the GMA so that will be a good test. | |||
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If memory serves, there is only something like .002 difference in shoulder diameter between the 300 and 375 H&H. At only .001" per side difference, I'd submit that if the difference causes feeding problems your action was on the verge of having serious problems anyway. I've re-barreled several 300 H&H rifles to 375 H&H, and never had a single hiccup. | |||
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Just to save you some time my 375 H&H was a 300 H&H and it feeds fine. It is no surprize as Winchester used the exact same parts except for the barrels. Now when someone else does the reverse you will be set. PA Bear Hunter, NRA Benefactor | |||
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Because of the finer threads and no secondary shoulder. the M-70 would not be my choice for a takedown. In the case of a takedown (only) I butt both shoulders...just a tiny bit more pressure on the C ring | |||
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I want to make clear that I am not advocating to use a Win 70 for your project. I am not a takedown fan. They have a purpose but I don't need that purpose. I was just trying to let you know that Win used the exact same parts for 300 and 375, feeflips, feed ramps, magazine box, follower, extractor, bolt face, everything. I want the OP not to sweat making 375/300 switch barrel due to feed issues. If it feeds one it should feed the other unless they modify the action too extreme for either in the feed ramp area. PA Bear Hunter, NRA Benefactor | |||
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Just curious, other than being super cool, a regular takedown (not one that is switch barrel which of course has obvious benefits) what purposes does it have? Red | |||
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I was referring to switch barrel models. The main purpose that I see switch barrels having is when you are limited by regs as to how many guns you may possess or customs(hunting trip) restrictions. To be specific it may just be too much hassle owning or traveling with more than one gun. Takedowns would ship or travel easier is the only thing other than cool as far as I can see. Not many of us are James Bond and need one for concealment purposes!!! LOL. PA Bear Hunter, NRA Benefactor | |||
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I ran some 300s through my 375 and they fed fine. FWIW Jason "You're not hard-core, unless you live hard-core." _______________________ Hunting in Africa is an adventure. The number of variables involved preclude the possibility of a perfect hunt. Some problems will arise. How you decide to handle them will determine how much you enjoy your hunt. Just tell yourself, "it's all part of the adventure." Remember, if Robert Ruark had gotten upset every time problems with Harry Selby's flat bed truck delayed the safari, Horn of the Hunter would have read like an indictment of Selby. But Ruark rolled with the punches, poured some gin, and enjoyed the adventure. -Jason Brown | |||
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This is a bit of a curve ball, but have you considered a switch-barrel rifle such as the turn-bolt Blaser R84 or the straight-pull Blaser R93? I have had an R84 for many years. My first two barrels were .375H&H and 300 Weatherby. That was the only rifle I used for perhaps ten years. I also have .243, .25-06, .280, 7Mag and .338 barrels, in addition to the .375 barrel. Recently I have reduced my horsepower requirements and sold the 300 barrel, but replaced it with a 300 Win. At one time I had a .257 Wby barrel but sold it in a bit of stupidity. You could buy a used, near new condition R84 with .375 and 300 barrels for less than the cost of that new action alone. Quick, Cheap, or Good: Pick Two | |||
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Vol717 Thanks for your Blaser suggestion but I have always been a Mauser addict. | |||
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The main purpose of a takedown is the the CDI factor. If you can afford a good quality takedown and actually haave a use for a takedown, you probably like to hunt in far away places which means your rifle is going to travel via air. Almost everybody confirms zero anyway so I don't see big difference in just taking your rifle out of the stock so it can fit in a take down case and then re-assembling. By the way, I think they are the coolest thing there is and if I was going to get rid of all my rifles, I would want a takedown in 270 and 9,3x62. Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.  What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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I'm not a gunsmith so take this with a grain of salt. Of the multitude of issues involved in getting a switch barrel set just right, the difference in feeding between a 300 and 375 will be among the least of your concerns. One area where I have a vast amount of experience is in making very expensive mistakes. Here I can offer the advice to get an expert gunsmith with lots of takedown/switch barrel experience under his belt (there are maybe a half dozen in the US and Canada) and talk with them about your project. If you decide to proceed, trying to cut corners is a recipe for dispair. I'd suggest you start your conversations with Duane Wiebe, Joe Smithson, Steve Heilman and Ralf Martini. These guys are the real deal. The project you're contemplating is going to be long and expensive at best but remember that regret lasts a long, long time. Good luck to you. ______________________________ "Truth is the daughter of time." Francis Bacon | |||
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TRY talking to justin sipp he is expert in things takedown and does very nice work from what I have seen . dont have my rifle back from him just yet. soon I hope. the two ctgs you are looking at are a nice combo. 338 win and 458 win seem better to me though. VERITAS ODIUM PARIT | |||
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Mike , Thanks for your opinion of the 270 and 9.2x 62 . That is another one of my considerations because they're the same case and there is a good separation between calibers.I already have a Oberndorf type A 9.2 barrel{ tapered octogon to round with full length integral rib and front sight} and am working on getting a GMA lefthand G33-40 action that Mike Roden is in the process of making.. A 270 or 30-06 would pair well with the 9.2. .Also I have a nice piece of Turkish that is already machined to fit.I know Ralf Martini well in fact we are hunting plains game together in S.A. in July. I have already picked his brain some. He uses the Hartman and Wiess latch but I have access to the Rigby the latch which I think is good as well.I have a Rigby 275 single square bridge take down that I can get a cnc copy of for even less than reasonable. I don't know how old my little Rigby is but I do know that comes apart and goes back together with out a hitch in accuracy. | |||
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Better get my numbers straight--Disregard the 9.2 and substitute 9.3. As for the 458 and 338 combination, I had thought of a 458 and 300 Win. Mag {I already have a 338} but Mike Roden of GMA didn't think it would feed well. Any thoughts or experience on this combination. It would be ideal as far a medium and large caliber duo. | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Gunsmithing Take down 375 & 300 H&H advise
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