Correct C.O.A.L won't fit in the mag..

[severnsider]

Greg,
Is it not simply the case that the TMK projectiles are longer/slimmer at the "sharp end" than, say, the equivalent weight SMK and others?
I was put off using them in my .308 as the OAL increased to the extent that they wouldn't fit the mag if powder space was to be preserved. Presumably the same would apply to your .308 too. Is it a Remington by any chance? In other words, if you seat the TMKs to mag length you risk losing case volume and having a compressed load.

[Thegreg]

Greg,
Is it not simply the case that the TMK projectiles are longer/slimmer at the "sharp end" than, say, the equivalent weight SMK and others?
I was put off using them in my .308 as the OAL increased to the extent that they wouldn't fit the mag if powder space was to be preserved. Presumably the same would apply to your .308 too. Is it a Remington by any chance? In other words, if you seat the TMKs to mag length you risk losing case volume and having a compressed load.

That's what I'm hoping. They are a long slender profile and I noticed in the .223 they had a longer C.O.A.L than the equivalent 55gr Hornady AMAX head.

I'm going to try Lapua Scenar's for starters, which I've heard good things about.

The rifle is a Krico 640S, not at all common so very unlikely I'd get feedback from anyone else who owns one on here!

Cheers
Greg

[severnsider]

That's what I'm hoping. They are a long slender profile and I noticed in the .223 they had a longer C.O.A.L than the equivalent 55gr Hornady AMAX head.

I'm going to try Lapua Scenar's for starters, which I've heard good things about.

The rifle is a Krico 640S, not at all common so very unlikely I'd get feedback from anyone else who owns one on here!

Cheers
Greg

The Scenars ought to work, but if you really want to use the TMKs then I think you're going to be stuck with single loading and not using the magazine. As you say, the TMKs will probably give you the same probem in the .223. Good luck!

[simgre]

The ogive of TMKs is set further down the shank. My Redding seating die won’t sit .223s deep enough firvnag length loading.

Roy Wetherby was a great proponent of free bore. He was so convinced of his testing that he was the first manufacturer to guarantee the accuracy of his rifles and all factory offerings had a long leade.

[harry mac]

Forget how far it has to "jump", see how it shoots when loaded to either book length, or just short enough that it fits the mag. You have to work very hard to make a .308 shoot badly.

[kennyc]

Forget how far it has to "jump", see how it shoots when loaded to either book length, or just short enough that it fits the mag. You have to work very hard to make a .308 shoot badly.

I 2nd that if it shoots at 2.800 why bother playing with the length? All you are doing is introducing variables and expending materials and time, of course if you enjoy that then crack on, but IMHO too many people jump straight past the basics and then get into trouble because of the "wisdom of the interweb"

[Parabuteo]

I only now shoot mag loaded rifles. The point of loading near or into the landes is more to do with getting a more constant pressure spike/release pressure than relationship with the landes.

The OAL can be pushed back as well as forward and still get excellent groups, although they groups will be more down to the harmonics/load, with the release point being a factor.

Many military rifle shooters simply set to standard OAL (SAAMI etc, or copy a service round), then neck crimp (which serves a similar function to loading into the landes but does not need the bullet barely hanging on, this is not ideal when you are loading from a mag via a feed ramp as you may well end up with an eccentric bullet).

Firm crimping gives a more consistant group in all of my rifles which are all mag loaded fairly rapidly. You do not have to worry about the landes eroding and constantly pushing the OAL forward either.

You can often get great results simply by factory crimping and changing the load.

[Parabuteo]

I 2nd that if it shoots at 2.800 why bother playing with the length? All you are doing is introducing variables and expending materials and time, of course if you enjoy that then crack on, but IMHO too many people jump straight past the basics and then get into trouble because of the "wisdom of the interweb"

Pratting about touching the landes is also more likley to get you into an over pressure situation as well Ken, a good firm crimp or neck tension wont.