Thread: 7mm Rem Mag with Sierra 168gr

Originally Posted by Dermastor

Thanks guys for your info. My concern is that although there maybe no signs of excess pressure many of the loads recommended do exceed either the powder or bullet manufacturers maximum. Although this will not result in a firearm failure it will most definitely result in short case life and increased barrel wear. Yes I know you think I am being overly dramatic. I am certainly not having a go at any one. I have been reloading for over 30yrs and in that time I have pushed the envelope at times myself. It is important that we keep the tiger in the cage when it comes to powder charges. Trying to get that extra 150fps will take its toll on gear and the animal will not be able to feel the difference. I will keep you updated on how things go.
All the best
Jeremy

30 years is a good start Jeremy -this forum will allow you to further understand that Tiger in the brass cage.

Almost without exception the loads posted above are loaded longer than Saami spec for overall length, the longer the ammo the further out of the brass case the projectile, the further out the projectile the more you increase powder capacity and drop ignition primary/internal ballistic pressure, this allows you to then add more powder and regain lost pressure/velocity.


Official Reloading books rely/presume/instruct ammo to be loaded at Saami length with the smaller powder volume that creates, hunters keen on terminal ballistics capable of reliable ethical kills adjust ammo length for best accuracy, often in long throated Sako/Tikka/custom rifles that also allow you to use brass selected for its largest powder capacity.

Hence the elevated figures you strike from time to time, it's important to understand this then no one panics when everyones Tigers seem to be slightly different in size.