I’m wanting to know if the extractor groove geometry is the same on the above. Does anyone have both of these that could take a close up of that geometry side be side for me? I have an extractor that hates the geometry on the 300 stuff so I’m hoping the 7mm is different. Thanks.
Nosler 300 win mag vs 7mm Rem Mag brass?
- Thread starter chuck nelson
- Start date
Leatherstocking
CGN Regular
- Location
- BC Rockies
Look up the SAAMI drawings?
Don't know if this is any help. From left to right - 300 Win Mag - 7 mm Mag - 264 Win Mag - 300 H&H Mag
All the rims measure .050" +/- .002" in thickness. They all look the same to me. If there's something else you want me to measure, I will do what I can, but I have fairly simple tools.
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Thanks! That is exactly what I was looking for. It is tough to tell, but the angle from the groove as it rides up to the belt is the key dimension I'm after. It almost looks like that the 7mm case might be different than the 300. You can see how different they can be in the photo Boomer posted. You don't happen to have one of the 7mm ones that are in the scrap pile do you. Id pay you to ship one to me. I don't want one if you are using it. Thanks.
- Location
- Western Manitoba
Somehow, I downloaded a copy of ANSI/SAAMI - Z299.4 - 2015 from Internet, some time ago - was free - do not recall having to pay for it? For 7mm Rem Mag, shows that angle from groove forward to belt as "35 degrees - 6 degrees" - so any angle from 35 degrees down to 29 degrees would meet the SAAMI drawing for that cartridge. The drawing for 300 Win Mag has exactly the same angle and tolerance. Both cases show the same dimension for the diameter of the groove: .475" - .020", so between .475 down to .455" would meet SAAMI drawing for either cartridge.
Seems to be all here - do not confuse chamber drawings with cartridge drawings... ht tps://saami.org/technical-information/ansi-saami-standards/
Seems to be all here - do not confuse chamber drawings with cartridge drawings... ht tps://saami.org/technical-information/ansi-saami-standards/
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You are welcome to have the one in the photo - it was amongst a bunch of rifle brass that I cleaned, but have no use for.
Just for your information - One of our CGNers was looking for some 458 Win. brass and I had 4 of them (in the same bunch of brass). I said he could have them, if he wanted to cover shipping and he said he would. I looked into it and the cheapest I could find with Canada Post, was $18 ! - for less than 3.5 oz ! Son-of-a-bishop ! Their rate for "over-weight" mail is $1.94, for anything under 4 oz - so I wrapped them tightly, put them in a small "bubble" envelope and put two, $1 stamps on it and mailed it. That was last week - haven't heard anything yet. That was going from Ont. to Sask. If you have any better way of getting this to you, I'll be happy to send it.
- Location
- Western Manitoba
Canada Post here has a plastic gauge - if it slide through the thin slot it goes as a letter, if it slides through the thicker slot - 17mm (?) 19mm(?) it can go as "letter mail" I think it is called - just sent two belted brass to a guy in Saskatchewan from here in Manitoba - sandwiched between thin cardboard - like from a cereal box, taped edges of cardboard - into a legal sized letter - slid easily through the wider slot - was $2.04 to mail - no tracking, goes as First Class Mail.
