Thread: Velocity gains with longer throat

Any info on this? Not trying to squeeze every last fps out, an accurate load is far more important but if the mag can take it I don't see why not to do it?

A Throating reamer is handy when you want to tidy up some throat erosion/ firecracking, and as long as the magazine will hold it, then the extra powder capacity availiable when a projectile is seated out further in the brass can be handy.

The right powder choice with a decent length barrel will help. A factory barrel length may not yield much benefit.

The difference between a short action caliber and a long action one (with same barrel length) can sway a velocity gain in favour of the short action cartridge when long throating.

Perhaps due to a short action cartridge having more rifling length in a std length barrel.

I have long throated a 7 mmsaum, a 7 mm rem mag and a 338 edge.

The saums gain in fps percentage wise beat the rem mag, and the edge beat them both, but it has a 32 inch tube, so roughly 29.5 inches of rifling, and the saum only had 18 inches of rifling and the rem mag 21 inches.

The only way to really know for your combination is to try it !

Originally Posted by 7mmsaum

A Throating reamer is handy when you want to tidy up some throat erosion/ firecracking, and as long as the magazine will hold it, then the extra powder capacity availiable when a projectile is seated out further in the brass can be handy.

The right powder choice with a decent length barrel will help. A factory barrel length may not yield much benefit.

The difference between a short action caliber and a long action one (with same barrel length) can sway a velocity gain in favour of the short action cartridge when long throating.

Perhaps due to a short action cartridge having more rifling length in a std length barrel.

I have long throated a 7 mmsaum, a 7 mm rem mag and a 338 edge.

The saums gain in fps percentage wise beat the rem mag, and the edge beat them both, but it has a 32 inch tube, so roughly 29.5 inches of rifling, and the saum only had 18 inches of rifling and the rem mag 21 inches.

The only way to really know for your combination is to try it !

what gain did you have on the saum??

I have a long throated 7-08 with a long barrel, it thinks it's a rem mag or 280ai.

The small cases with large bullets should benefit the most as normaly the bullet takes up so much powder space.

What are you looking at playing with ?

ala Weatherby??

Originally Posted by Spanners

ala Weatherby??

Yip Weatherby were the first to take advantage of velocity gain in there line of cals

I'm looking at wsm or saum with short barrel

A 7mmsaum with a 16 inch barrel will give you 3000fps with 140g projectiles, quite usable, the short barrel no slouch in the accuracy department either !

Not that short! Was thinking 20in with 162

Does anyone understand what Shaun Carlock is doing with his Edge+P? Sounds like its some sort of long throat arrangement.

Originally Posted by L.R

Does anyone understand what Shaun Carlock is doing with his Edge+P? Sounds like its some sort of long throat arrangement.

And probably a "special" barrel ?

Like Kiwi Greg my 7mm08 thought it was a 280 Rem - 24" barrel & long throat so the boatail junctionof a 180gr VLD was above donut gave 2,600fps & the 162gr Amax up to 2,850 fps. Scary performance for the little 7mm08.

That's at least 200fps off a 280. So not really comparable.

Originally Posted by L.R

That's at least 200fps off a 280. So not really comparable.

So you have a 280 with a 24" barrel that will put the 162s out at 3050 ???

Originally Posted by Kiwi Greg

So you have a 280 with a 24" barrel that will put the 162s out at 3050 ???

You have a 708 that puts 180's out at 2800 so 3050 with a 280 and a 24" barrel dosent seem silly does it.