i know that the 75gr amax cannot be seated safely to magazine oal, but i was wondering if the 75gr berger vlds could or the 75gr swift scirocco? i know that they are all vld ogives, but just wanted to check with some folks. worst case scenario, i know i can do the 70gr vlds, but this is going to primarily be a cyote gun and i am not worried about pelt, and i am not in the business of making any animal suffer, so i would like any testimonies of performance on animals, i want drt one shot drops, and idk if a target bullet will do that. i know the amax will, if i can shoot them, as many people say they expand almost as fast as a vramint bullet. thanx for all info! o, other suggestions welcome as well.
No, the Berger 75 VLDs will not work through a magazine (2.260" OAL), due to it's long ogive. With the 223/5.56mm case, you're limited to about a 7 caliber ogive in order to have a bullet that will seat properly in the case, and still function through the magazine. You've only got about .500" from the case mouth to the max OAL, and it's this dimension that limits bullet design in projectiles intended for magazine use in this cartridge. Anything longer than a 7 cal ogive and you'll wind up seating part of the ogive beneath the case mouth when it's at 2.260" OAL, and that's a bad thing looking for an opportunity.
Good news is, Berger does make a 77 grain BTHP that has a 7 caliber ogive, and will function perfectly at mag length. It's their part number #22425. Plenty of other choices out here as well, but I hope that helps.
Don't know about the sciroccos, never messed with them, never seen any. However, the 7 caliber ogive limitation remains in effect. If it has anything much more than 7 cal, it's not suitable and will have to be too deeply seated. Just measure from meplat to the major diameter of the bearing surface, and if the distance is more than .500", it's not going to be a good candidate for mag loading.
Any of these bullets, including the long ogive VLD style projectiles will work in the AR, just not through the magazine. The 600 yard stage of the NMC-HP course requires the rifles to be single loaded, which is where the concept of these bullets came into being in the first place. If you're willing to single load them and use the rifle as a single shot, no problem.
As far as using them from the mag of a bolt gun, that'd depend on the dimensions of the mag itself. If it's set up for the standard SAAMI dimensions of 2.260", then you're back to single loading. Assuming it has a longer mag, then yes, you'd be able to load it out to whatever the magazine would accept. Just bear in mind, there's not necessarily any direct corelation between mag length and throating. In other words, if they match, you're golden, but if they don't, don't be surprised.