This Can't be right

[HeXeD775]

I'm new to realoading, I shoot 30.06 Remingtom 760 pump. For good accuraccy I learned that it is better to seat the bullet to the point where the ogive is at the lands in the barrel therefore minimizing the "jump" the bullet has to make when fired. I got the Hornaday Curved OAL Gauge & 30.06 modified case, when measured using the gauge i found that my factory loads (Federal 180gr 30.06 ballistic tip) are measuring 3 1/16". Whe I measure the chamber the measurement comes out 1/4" longer than the factory loads I buy...see the reference pic on the right, on the right is my factory load, the modified case in the middle & a 180gr bullet on the left to show just how much of it would actually be seated in the case...
My thought is it cant be safe w/ that much only siting in the case & 2 the cartridge would then be too long to fit in any mag I have (pic on the left w/ fac round in mag.). Im already at max space in the mags using factory loads.

Has anyone found similar results?
I guess I can't really do what i originally planned to do. Any ideas?

 

[Cypress]

I think that it is generally accepted safe practice to have at least a bullet diameter of length touching the neck(this does not include the boat tail portion). For example the 30-06=.308 contacting the neck. The only option is to seat the bullet deeper if you don't want a single shot.

 

[snuffy]

This Can't be right

Yup, sure is! You just discovered what others know. You can't seat that far out for any rifle that has a magazine.

That "fact" you "learned" is not necessarily so. SOMETIMES seating closer to the lands results in better accuracy. Not always.

I seriously doubt you would be able to tell with a pump Remington. They just aren't capable of too much in grouping ability.

As far as how much your bullet would seat into the neck, that's plenty to hold it. You only NEED one caliber, in other words, .308 deep in the neck. Looks like you should be real close to that.

You can still load single shot with that long seated bullet. You may NOT be able to eject a loaded round that long, so be sure you try it first time at the range.

 

[Ol` Joe]

Lots of manufactures throat their rifles quite deep. It isn`t a rare occurance.
The idea the bullet needs to be at the lands isn`t always true either. The Weatherby rifles, old Swede 96`s and a few others are known as very acccurate rifles. They are throated extreemly deep. The bullet in these rifles might be as much as a tenth or more back from the rifleing. I wouldn`t worry too much about yours. Set the COL to the SAAMI max with the bullet of your choice and work up a load. After you find your rifles max try seating deeper in 0,005" increments. You should notice your groups tightening then starting to open back up. Try adjust the COL in 0.003" steps from the most accurate point you had and see if it improves accuracy. The point of best accuracy may be quite a bit deeper then your SAAMI COL, don`t be suprised.

 

[Bartkowski]

I seriously doubt you would be able to tell with a pump Remington. They just aren't capable of too much in grouping ability.

Have you shot one? I have only tried two types of ammo in my 7600 and it shot .75" at 100yards easy. These are only 3 shot groups, but for a factory gun with some cheap federal fusion hunting ammo I'll take it. I am sure if I shot some match grade ammo that the gun could do even better...maybe .5"; probably no better than that though.

 

[snuffy]

Have you shot one?

Yes, several. The way the barrel is held to the receiver,(a bracket), no free floated fore end, and a sheet steel receiver, are not conducive to accuracy. Some are quite accurate, but I certainly would choose another type of rifle for real accuracy.

 

[HeXeD775]

U guys/girls are great

Thanks a million gang...i really appreciate the info.

 

[David Wile]

Hey folks,

I'll join in with Bartkowski on this one. I used to have a 760 in .243 Winchester that I could shoot half inch groups of five at 100 yards when using my ammunition loaded with match grade bullets. And I was never really a very good shot. I would bet that Rem 760 could have done much better if it had been shot by a really good shooter.

Best wishes,
Dave Wile

 

[MCMXI]

Yup, sure is! You just discovered what others know. You can't seat that far out for any rifle that has a magazine.

Actually, I can with my Remington 700 in .300 Win Mag with an AI stock and 5 round magazine but not with my Remington 700 in .308 with an AI stock and 5/10 round magazines. I sent both rifles to Kreiger and they're installing new barrels with chambers optimized so that specific bullets can be seated so that they touch the lands and the rounds still fit in the magazines.

 

[Bartkowski]

no free floated fore end

The fore end on mine doesn't touch the barrel. I can slide a piece of paper all the way to where the barrel meets the action. I understand that they aren't the best for accuracy, but they are certainly capable of MOA groups at hunting ranges.

 

[Remo-99]

seating the bullet to touch the lands upon chambering, personally not something i would do in a hunting rifle unless there was cause for it, i.e. accuracy problems, compressed powder charges, very long projectiles etc. As a bullet resisting forward movement from the start, as opposed to having the free jump before contacting the rifling, will cause a larger than normal pressure spike and if using hot loads as many sometimes do, then becomes a safety issue. In the times gone by when tooling, to make chambers in some lower priced rifles, lacked close tolerances. engaging the rifling to center the cartridge in the chamber was fairly common practice to reloaders, also in rifles that may have had erodded the throat, through lots of use, to improve accuracy from excessive bullet jump. This being different from a bench rest rifle where every little trick helps to get a result. So for a hunting rifle I wouldn't bother with it, unless there a reason to do it.

 

[243winxb]

760 & 7600 difference

The early 760 has a metal bracket supporting the barrel at the very end of the pump action slide tube, its not free floated because of this pressure point. The 7600 had no pressure point or tube, it is a free floated barrel. Yes , some rifles can be very accurate keeping groups at MOA.