Thread: Super light thinking

But once those bits of 416 are machines they will be way less....

Originally Posted by robhughes-games

But once those bits of 416 are machines they will be way less....

Oh yes and it's so easy to machine when you're used to 4140

And some 7075 will sneak in there and oh so light, strong and easy to machine

Originally Posted by akaroa1

Oh yes and it's so easy to machine when you're used to 4140

And some 7075 will sneak in there and oh so light, strong and easy to machine

receiver and bolt body from 7075. only the pressure bearing parts from high tensile steel would be one way of shedding weight... but you need to know what you are doing there regarding sizing and strength calcs...

as for scope: iron/open sights?

Originally Posted by STC

receiver and bolt body from 7075. only the pressure bearing parts from high tensile steel would be one way of shedding weight... but you need to know what you are doing there regarding sizing and strength calcs...

as for scope: iron/open sights?

I wouldn't put 7075 in a pressure critical part.
Although I have used it for barrel outers with a pencil thin 4140 or SS inner barrel.
It does work well and has contributed to a couple of very light and accurate stubbed Contender barrels

Originally Posted by akaroa1

I wouldn't put 7075 in a pressure critical part.
Although I have used it for barrel outers with a pencil thin 4140 or SS inner barrel.
It does work well and has contributed to a couple of very light and accurate stubbed Contender barrels

read again what i said.

parts under pressure must be out of high tensile steel.

Also its not just material choice but also design of those conponents, sizing, cross sections, pressure bearing, stress concentrators due to sharp corners etc. meaning they MUST be properly engineered...

Anybody that does not understand these factors should stick to proven and tested off the shelf components and not touch pressure bearing parts.