How many do not believe that the tapered case of the 375 H&H "aids in feeding"

I believe it does, I got into it on another forum and there are a few that claim it only aids in extraction

What do you guys say?

It's very simple.The smaller the case and bigger the chamber the easier it will feed.

JWP

Hey, first, got your message this morning, but still not speaking all that much right now, and is a bit of effort. Getting better however by the day, thanks for the call!

Yes, I think tapered case does feed better. No doubt. Required on some rifles. Even the B&Ms have taper, not quite as much as some however. In some rifles you can get away with less taper. But overall, and in general, more taper is a good thing and aids in feed and function.

M

oddly enough.. machine guns generally don't just highly tapered rounds, such as the 375 .. the 308 has far less taper than the 30-06 .. i believe only the russians use the 7,62 in their medium guns ...

the 223 certainly isnt very tapered, the 5.8x23, or the 9mm/45ACP aren't much either..

but all are basis for various high speed autoloaders.. some even staggerfed

in short.. it doesn't make a difference, once the correct angles are figured out

Machine guns don't feed from a double stack magazine as a rule. Feeding from a belt is much the same as feeding from a single stack magazine.

I think the tapered cases are definitely an asset in reliable feeding. Straight sided cases are easier to extract.

Every action has a certain amount of "give". Since a tapered case obturates at the moment of highest pressure, when the pressure subsides it is driven forward by the elasticity of the action into the tapered chamber with a kind of wedging effect. This wedging effect is missing when a straight sided case is driven forward.

My .458 WM double rifle always extracted effortlessly, while the .375 H&H barrel set for the same rifle had extraction problems which had to be addressed before I was willing to take it to Africa.

not being a jerk to you.. just lining it out, in stream...

quote:

Originally posted by xausa:
Machine guns don't feed from a double stack magazine as a rule.

actually, they do feed from double stack mags, as a rule .. the ak47/74 and variants, the m16, the sks (not really an auto), the garand, and the m14 are all double stack feeders .. the SAW can even be mag feed .. its the EXCEPTION, based off of numbers in use, that is belt fed.. all mp5/ hk91/893, etc etc etc are double stack make fed.

quote:

Originally posted by xausa:

Feeding from a belt is much the same as feeding from a single stack magazine.

i don't disagree . but this is the exception, based of percentages, not the rule.

quote:

Originally posted by xausa:
My .458 WM double rifle always extracted effortlessly, while the .375 H&H barrel set for the same rifle had extraction problems which had to be addressed before I was willing to take it to Africa.

that's cool to know! so, you are saying the straight walled case extracts easier ..

xausa-Guess the Uzi,AK47, mp5,m16,m10,11, FN-FAL, M14. Etc are not real machine-guns as they all feed from double stack mags. A belt feeding mechanism has absolutely nothing other than holding bullets in common with a single stack mag.
Personally I've found ease of extraction more a function of how well the chamber was polished rather than the inherent taper.-Rob

Don't forget that bullet shape has a LOT to do with feeding problems and lack of...in fact, I'd go on record as believing that bullet shape has MORE influence on feeding than case taper

I once borrowed a 243 AI with a very sharp almost square shoulder - shot accurately, but didn't feed at all well - a function IMHO of the cartridge, but also the builder not getting the timing etc right. Built on a Remmington 700 action.

quote:

Originally posted by Duane Wiebe:
Don't forget that bullet shape has a LOT to do with feeding problems and lack of...in fact, I'd go on record as believing that bullet shape has MORE influence on feeding than case taper

I concur with that 100%. While taper is a factor, I would not consider it the number 1 factor involved. Speaking for Winchester M70s, get over about a 67-68% Meplat of caliber then you can have issues. Most 70% meplat of caliber will bump the bottom of the feed ramp, stoppage. This is a rifle that has no work done for that. Of course, Rugers you can't get much over 50% meplat before running into problems. 50% meplat, one needs to do rifle work, not adjust bullets! Drop below 65% meplat, you start loosing terminal stability, so it's rifle adjusting time, if that won't feed.

Michael

A hunting partner of mine was badly bitten by the flat trajectory bug. He sunk sustantial money into converting his 30-06 Rem 700 ADL into 300 Dakota. In doing so, he reduced the magazine capacity to 2, but the rifle was a dandy to handle. It wouldn't feed reliably, though. Several returns and complaints to the gunsmith provided no fix. Eventually, he rebarrelled to 375 H&H, and all of a sudden this rifle feeds smooth and nice. Holds another one down, too. The taper of the H&H case makes all the difference.