s&w 1700ls freebore?

[gibble888]

I have a smith and wesson 1700ls chambered in 270 win and just got my dies today and started working up a load. I left the bullet seated extra long to find the rifling and didnt hit it...not even close as far as i can tell. I like to know where it is so i can play with the "jump" or "jam" etc. Ive been doing some research on the 270 and found that the 270 weatherby "mag"? Has much freebore or at least some do and im thinking maybe because howdah made weatherby and the s&w that is why the possible freebore. Or maybe its the norm for the 270 wcf.

 

[gibble888]

Ttt

 

[ironworkerwill]

The cheap method is to use a marker and mark the ojive of the bullet. Using a DUMMY round seated too far out and don't force it into the chamber. Just untill it meets slight resistance.

What is your coal now with the "extra long length"? And what bullet are you using?

 

[Kernel]

Chamber cast........

http://www.rotometals.com/product-p/chamber_casting_alloy.htm

 

[gibble888]

It was 130gr sst what i mean by xtra long is it was in the brass just enough to hold well...i did measure but i did not write it down yet just left the caliper set, i used a shot brass so it was loose, opened the bolt dropped it in the chamber and it slid all the way home...so i closed the action and then took it out expecting some change and there wasnt. I chose 130gr cuz my twist rate is 1:10.5

 

[Reloadron]

It was 130gr sst what i mean by xtra long is it was in the brass just enough to hold well...i did measure but i did not write it down yet just left the caliper set, i used a shot brass so it was loose, opened the bolt dropped it in the chamber and it slid all the way home...so i closed the action and then took it out expecting some change and there wasnt. I chose 130gr cuz my twist rate is 1:10.5

This is where you may want to give Kernel's post some thought and do a chamber casting to see what is what in there.

Ron

 

[gibble888]

Great suggestion...will do, i was just trying to get some hard to find info kinda hoping someone had one on here. But no prob ill just post my findings so there is a little info.....thanks for ur time ron and thank you for the link kernel

 

[gamestalker]

You can certainly use an unsized piece of brass to find max OAL, but it's not going to be as easy to do if you don't have at least some rather tight bullet shank to neck fit. Other wise you won't have a way to prevent it from being pulled back out when you open the bolt and extract it if it gets into the lands at all.

I always just seat a little deeper in .005" increments until I'm at zero, or max OAL, and then adjust from there until I've found the sweet spot.

GS