Anyone done one?

I did mine on a 1903 Springfield.
I can't see any reason why a M700 wouldn't work.
Start with a 30/06 based rifle ( 25/06, 270, 280, 30/06, 35 Whelen )and re barrel. I'd put sights on it too and a 2-7 scope in QR rings. But that's just me.

Just keep in mind that the type of people attracted to the 400 Whelen are the same type of people that whine loudest about controlled feeding, LOL. You wanna really get tongue's wagging, do it on a Savage, ha!

Do what makes YOU happiest.

Save the 700 for a 6.5 Sherman. Build a 400 Whelan on a Springfield, US Enfield, 98 Mauser ect. One built on a CZ 550 Medium action would be sweet.

It will have an m16 extractor, I just like 700s better.

Forget the CRF arguments, that's for Africa and DG and for arguing about

I wanted to do a 416 x 270/280 to get a bit more length/volume but got talked out of it by arguments that seemed valid at the time but have been soundly thrashed here on AR....I did a 416 Taylor instead.

I have that cartridge design saved...it's nothing more than a straight walled case necked to 416 cal. and ~78 gr H20 volume. Would do ~2250 fs with a Speer 350 gr, ~2150 with a 400 gr. Plenty of thump out to 250 yds for all the large horned plains game. I keep thinking about doing one if I can find a cheap 700.

For the Rem 700 it's just a rebarrel/chamber job. Headspace on the case mouth and keep the tolerances firm on both the chamber and the sizer die and you probably won't have to size except for the neck. Do the same for the 400 Whelen, it's a great cartridge also.

Mine is on a Winchester left hand model 70 but I see no reason not to build one on a Remington 700. It's a good action. I have both push feeds and CRF rifles and honestly don't see one as better than the other.

I neck size only on mine and in almost 1500 rounds of test loads and a few trips afield, Ive never experienced any of the mythical headspace issues wrongly associated with this wildcat.

Build it on a 700 and enjoy the daylights out of it. It's one fun cartridge.

Mart

quote:

I wanted to do a 416 x 270/280 to get a bit more length/volume but got talked out of it by arguments that seemed valid at the time but have been soundly thrashed here on AR....I did a 416 Taylor instead.

I built a 416 PDK which was an improved shoulder forward 280. It worked fine. Later I backed it down to 411 after the selection of 411 bullets improved. Next step was using 2.65" cylinder brass.

As the 400 Whelen guys have proved if you seat the bullet way out of the case for a long COAL a 2.65" case doesn't gain you that much velocity. It does give you the option to use the cannleure.

A 700 would work fine.

Find a Remington 30S

That's true Ramrod, but because the energy goes up at the square of the velocity a small change in velo can add a large amount of energy.

It's all relative to case size, bullet cross section, powder selection, bullet selection, etc., and gets into nitpicking in the smaller cases, but it does bring in a relatively large amount of energy in large cases getting into the ~100 plus gr H2O size.

50 fs in a case the size of a 500 NE means ~300 plus ftlbs with a 550-600 gr bullet. 50 ftlbs is relatively easy to get with several methods.

I didn't even look at the cylinder case for some largely forgotten reason...might have changed my mind back again.

Just saying...not for everyone...I like options of all kinds.