Deep Throat 700


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briang7511
December 16, 2011, 09:22 AM
I measured my rem 700 sendero chambered in .300 win mag with the hornady OAL tool. With a 208gr amax COL is 3.630. That is the whole length, bullet touching the lands. Seems really deep comparing to the book which gives a COL length of 3.340. I got a measurement from somebody a while back of an exact same rifle and bullet combo of 3.555 and the bullet was .010 off the lands. When i measure a 180gr mk that bullet is barely seated in the casing. COL is 3.610. Not sure what everybody else is measuring at and if this is normal?

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USSR
December 16, 2011, 09:29 AM
Remington M700's have a reputation for long throats. I would seat the bullet to an OAL that leaves 1 caliber (.308) of the bullet in the neck and see how it shoots. Some bullets will shoot quite well despite being "jumped".

Don

amlevin
December 16, 2011, 10:54 AM
My "700" has a deep throat and magazine length cartridges make the bullet jump around .150". For some reason they don't seem to care as I can shoot groups around 3/4" at 200 yards with this rifle. 100 yard groups approach "one hole" size if I do my part.

MtnCreek
December 16, 2011, 11:10 AM
For some reason they don't seem to care as I can shoot groups around 3/4" at 200 yards with this rifle. 100 yard groups approach "one hole" size if I do my part.

They must have built that one right after prayer meeting.:)

I have a factory 700P in 300wm and cannot reach the lands. From what Iíve heard, I think thatís typical.

briang7511
December 16, 2011, 12:14 PM
I have tried hsm factory ammo with 190gr mk, measured at 3.340 they group around 2.5 to 3 in at 200 yds. i have loaded 190 and 200 mk laddered up with rl 22 set to 3.340 and have got groups around 2 to 2.5. last batch was with 208gr amax rl22 laddered up from 68 to 72gr of powder and got a little better groups with 68 to 69 gr COL of 3.575 so about .055 off the lands and had some groups around 1.8in. my goal was to have 1000yd target rifle with less wind deflection, but with sub par accuracy its tough to keep shooting when my savage mod 12 .308 will shoot 1/2 groups all day with different ammo and have 9 out of 10 rounds hit the 1000yd gong. next loads are going to be closer to the lands and trying some imr4350. any suggestions on loads?

gamestalker
December 16, 2011, 01:17 PM
I have done a bit of research on the 300 WM and it isn't at all unusual to have difficulty seating up to the lands. Most of the problem revolves around the very short necks, according to what I've read.

snakeman
December 16, 2011, 01:50 PM
The title of this thread is an eye catcher! Darn the trickery!

LoonWulf
December 16, 2011, 01:54 PM
LOL, I agree...i had to click...couldnt help it :p

My 7mm remington 700 has kinda along throat, im loading my rounds with 168grn berger or 162 amax at 3.46 and im JUST off the lands.

USSR
December 16, 2011, 02:14 PM
I have tried hsm factory ammo with 190gr mk, measured at 3.340 they group around 2.5 to 3 in at 200 yds. i have loaded 190 and 200 mk laddered up with rl 22 set to 3.340 and have got groups around 2 to 2.5. last batch was with 208gr amax rl22 laddered up from 68 to 72gr of powder and got a little better groups with 68 to 69 gr COL of 3.575 so about .055 off the lands and had some groups around 1.8in. my goal was to have 1000yd target rifle with less wind deflection, but with sub par accuracy its tough to keep shooting when my savage mod 12 .308 will shoot 1/2 groups all day with different ammo and have 9 out of 10 rounds hit the 1000yd gong. next loads are going to be closer to the lands and trying some imr4350. any suggestions on loads?

briang7511,

By going to the faster burning IMR4350 powder, you will be sacrificing velocity and wind deflection with the heavy bullets. I shot the .30-06 for years in 1,000 yard competition with the 190SMK and RL22. I essentially duplicated the Sierra Gold Medal Match .300 Win Mag load (2900fps), and only required about 30MOA of "up" from a 100 yard zero to reach 1k. A more suitable powder, if you don't want to go with RL22, would be H4831. As I previously stated, just have one caliber of the bullet (not counting the boattail) inside of the neck.

Don

chrome_austex
December 16, 2011, 03:48 PM
My .308 700 varmint also had a very long throat.

Since the Remington 700 is so mass market, I'm guessing they setup their guns to err on the safe side. Not too friendly for us reloaders tho, eh?

LoonWulf
December 16, 2011, 04:28 PM
i dunno, with my long magazine, i LIKE the long throat :D

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