Anybody ever

[Mike A.]

shot a Savage 2400 or other combination gun or double rifle with "separated" barrels fast enough to heat up the rifle barrel(s)?  I wonder if the group will "walk" as the barrel heats up.

Obviously a theoretical question, since most of these are for hunting that doesn't involve shooting lots of shots fast, but I wonder if you used a .222 or other varmint cartridge barrel for, say, prairie dogs, you might get "wandering" bullets.  (I can't reload fast enough to heat up even the barrel of my .308).

[dougk]

Hey Mike

Great question.  When ever I sight in a combo gun I like the barrel to cool to the point of being a cold bore shot.  Every hunting situation I have been has the first shot has been a cold bore shot.  Drillingman has posted pictures of his 30-06 three shot group where the Valmet quick release scope mount was removed then reinstalled inbetween shots.  I rememeber the group being very tight.

[Mike A.]

Yeah, Doug, I read ya.  With a single shot or single rifle barreled combo, you don't really CARE where the third shot is gonna go, let alone the fifth or tenth.  Because 99% of the time the game is gone by the time you could shoot the third one.

 When I check zero on these guns before hunting season, I shoot two shots as quick as I can from a cold bore.  If they go right, the gun goes back in the case ready for the season.

[Drilling Man]

  Here's the target Doug was refering to,
 

 
  I've never seen a smaller cartridge/2400 or 412 heat up the bbls enough for the groups to move around.  Perhaps it would if enough shots were fired though?
 
  DM

[dougk]

 
  I've never seen a smaller cartridge/2400 or 412 heat up the bbls enough for the groups to move around.  Perhaps it would if enough shots were fired though?
 
  DM

When sighting in my Baikal Izh-94 the 30-06 barrel did walk, I believe it was up and tot he left.

But I dont have that gun any more...

[Mike A.]

I'll have to look at a Baikal and see if the barrel attachment is significantly different from the Valmet system.  Barrel diameter might have something to do with it, too.

Maybe there's a member with four hands who can fire a combo faster than I can....for me, it is not the gun for "firepower."

[Missionary5155]

Good morning
It is not real practicle but if you load full cases of 2F BP I bet-cha you can get them barrels hot alot faster.  I shoot RB out of my FoxB 12 bore.  Granted those are thinnish barrels compared to a real double.  But with 135 grains of 2F it only takes 6 rounds out each side to bring temp up to hotter than I want to hold on to.  At 35 yards I cannot tell any real difference as I do not have rifle sights on it and all I wanted was a 35 yard smasher.
Mike in Peru