Long throat in a 22-250 Model 700

M

MDM

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My Remington 22-250 has somewhere in the neigborhood of 300 rounds run through it. I really haven't shot it much in the last 10 yrs and have not reloaded for it until now. I have some 55 gr Blitzkings and H380 to start with. I checked the max C.O.L to the lands for this bullet and it seems really long - 2.505". If I start with the standard max col of 2.35 I will have a jump of .155".

This seems quite excessive, is this typical for Remington's to have such a long throat? Should I just start out at 2.35 and mess with lenth later, after I find a charge it likes, or would it be OK to move the bullet out to start with, and make the jump .030 for the intial loads? One last question, any magic loads for H380 and 55gr BKs? I have alot of friend that say 38gr of H380 was the ticket.
 
It might be typical for remingtons to have that much free bore. I had a CDL in a 300 RUM that if you seated the bullets to touch the lands it was to long to fit in the magazine. Hand loads for Both my SPS Varmit in 204 and my VSSF II in 22-250 both are considerably longer than factory ammo. It never seemed to hurt the accuracy any. The 300 RUM would shoot less than .75 MOA and my 22-250 shot a little closer than that factory ammo. Never shot factory in my 204.
 
You know, I can't really remember but I would say it had to be atleast MOA because it shot most brands of 55 gr ammo well enough. Maybe that answers my question?
 
Originally Posted By: MDMYou know, I can't really remember but I would say it had to be atleast MOA because it shot most brands of 55 gr ammo well enough. Maybe that answers my question?

I would not worry about a long throat on your Remmy. I have an old Ruger, Yes a Ruger. It will shoot one hole groups and it has a very long throat, a 52 grain Sierra HPBT Match bullet will barely stay in the case seated at .010 off the lands. I seat mine close to what Sierra say to seat them. So a long throat doesn't seem to matter.

DAB
 
I've done the "mark the cleaning rod method" and chambered the bullet while in a modified case so the bullet can slide back into the case as it is chambered. Both methods get me in the ballpark of 2.505.
 
Can't comment on the Remmys, but I have a weatherby vanguard that has on oal of 2.520 - too long to seat a bullet close to the lands (for my comfort). Set it back .30 and it shoots very small groups with 55gr Noslers. I also have a Kimber with an oal of 2.505 and shooting 55gr Noslers .10 off the lands with no problems. As far as powder, I'd try 38gr of H380 and work up in .5gr increments. If that doesnt work, H4895 would be my next choice. Varget and 4064 have also done well.
 
MDM, if you start to see accuracy suffering, go to a 55g Sierra Semi point or a 63g sierra Semi point which will stabalize in your 1-14 twist. These bullets are really accurate in a 22/250. I found the Sierra 55g Semi points to be as accurate as 52g Bergers in my 22 PPC Bench gun. I could not tell the difference in wind drift till about 300 yards and it was minimal.

There is a current trend to shoot a poly tip bullet, don't feel handicaped if you don't shoot a poly tip bullet, they are long and pointy, and don't do well if they have to make a long jump in Some guns.

With the 55, I shot a hot load of 39.2g of H380 which held up very well to 400 yards with the 55g Sierra Sp, work up to that load in your rifle.
 
Originally Posted By: MDMMy Remington 22-250 has somewhere in the neigborhood of 300 rounds run through it. I really haven't shot it much in the last 10 yrs and have not reloaded for it until now. I have some 55 gr Blitzkings and H380 to start with. I checked the max C.O.L to the lands for this bullet and it seems really long - 2.505". If I start with the standard max col of 2.35 I will have a jump of .155".

This seems quite excessive, is this typical for Remington's to have such a long throat? Should I just start out at 2.35 and mess with lenth later, after I find a charge it likes, or would it be OK to move the bullet out to start with, and make the jump .030 for the intial loads? One last question, any magic loads for H380 and 55gr BKs? I have alot of friend that say 38gr of H380 was the ticket.

Factory chambers often have long throats. Actually that length isn't bad at all. It looks long compared to a factory round because factory 22-250 is seated way deep. Remember that stuff has to fit every magazine.....a 788 magazine for instance is very short. I've seen factory 22-250 with 55's seated down to where the casemouth is past the ogive. At 2.35" that bullet is below the neck/shoulder junction. If your chamber seats a 55BK at 2.505" to the lands, that's 2/3-3/4 way down the neck which is fine. Don't worry about "max cartridge length" in a manual. Just seat bullets for your chamber.
 
Man am I glad to see someone else has a "liberal" throat in their 22-250. I have a relative NEW Ruger M77 MKII that has a jump of .080 which I thought was excessive. But after playing around with powders (and I'm still at it) I discovered she likes 52, 53 and 55 Gr Sierra Match/Blitzkings a great deal that put together very very impressive groups, so much so selecting the best powder to use is not easy. Groups do tighten up a bit when I load .0001 off the lands (carefully watching for excessive pressures), but even with factory ammo (using the aforemention bullet weights), theres not a huge difference.
 
ALL 22-250 reamers start the throat at a diameter larger than the bore.
They technically have no freebore. But if you draw out a graph you will see
that at a 1.5 degree angle it takes a long way to reach bullet diameter and then
even more to actually have the lands start engaging to spin the bullet. It's not
a caliber you are normally going to load to the lands with light bullets and have
a lot left in the neck. I'll try and find a diagram of a reamer and post it.
 
My rem 700 in 22-250 measures 2.465 the first 250 rounds I put thru it was wolf gold ammunition 55gr sp and was getting nickle size groups, after gathering enough casings I worked up a load with h380 55gr btfmj I started at 35 gr and went up to 40.5 gr .5 gr at a time and found 38gr gives the best group a dime at 100 yds and all were seated at max oal 2.350 .115 off the lands. this summer I will try seating closer and see if I can improve any on it
 
MDM,
You should really be measuring the "ogive" on the bullet instead of the "oal". You'll get a more accurate reading this way.

My loads in the factory 700 22-250 are:
55gr Vmax is 3.070, this is measured from the "ogive". That would be a .015 jump.
Measuring the "oal" it is 2.515.
 
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