............243 Bullet Jump....?

dan brothers

dan brothers

New member
Loading some 58 vmax... the full loaded length... to the lands are 2.681 in my savage 11.

Been shooting it with 2.660

Just realized today if I add the case length... 2.043

plus bullet length......0.794 = total = 2.837

subtract bullet dia... .243... it then equals = 2.594

so... if I seat it to only 2.660... it is barely in the case... only about .177.

Is that enough to really hold it in a bolt rifle... or should I seat in the depth of it's dia... 2.594.

I know I will have to shoot and adjust different bullet seating depths for true accuracy... but was just wondering if I need to seat it deeper ... or is .177 okay for now.

.087 seems like alot of jump.
 
I load mine to 2.625" and the best I could measure that puts me .070" off the lands and yields the best groups for me. Remington R25.
I know that don`t realy answer your question, but maybe makes .087" not seem so far..IDK
Obviously they haven`t fallen out..lol..can you pull one out by hand? Just curious.
That .177" depth may even be a little less considering the boat tail.
 
Originally Posted By: dan brothersLoading some 58 vmax... the full loaded length... to the lands are 2.681 in my savage 11.

Been shooting it with 2.660

Just realized today if I add the case length... 2.043

plus bullet length......0.794 = total = 2.837

subtract bullet dia... .243... it then equals = 2.594

so... if I seat it to only 2.660... it is barely in the case... only about .177.

Is that enough to really hold it in a bolt rifle... or should I seat in the depth of it's dia... 2.594.

I know I will have to shoot and adjust different bullet seating depths for true accuracy... but was just wondering if I need to seat it deeper ... or is .177 okay for now.

.087 seems like alot of jump.


One of my Remingtons, a 660, is 2.713 to the lands, and I seat to 2.686 OAL, that's .027 jump.

Not much there in terms of seating depth, but then again my shells go from the case card to the magazine, load and fire. If I was going to put some shells in my pocket for three days and walk for 20 miles I might want them seated deeper, but for doggin and paper punching I am ok with the seating depth.
 
I had read someplace recently that you want the at least a caliber worth or seating depth so .24 in the case. I tried som 55 gr bullets and not impressed so Im going heavy. I'll use the 22-250 for 50 gr pils
 
Dan

If this helps, I have a 22-250 that with a 52 GR. Sierra Match king if I seated them to .005" off the rifling I would only have 0.0625 of the bullet seated in the case so I just seat it to have 0.224" into case and they shoot very small groups consistently.

As Smokeless said with the seating depth of 0.177" you might not want to pack them around in your pocket, not that they would go off or anything like that.

Would they fit the Magazine and not get whacked out of alignment upon chamebering? If they didn't and they still shot good groups in you OCW testing go for it.



DAB
 
Yeah... I'm going to seat them deeper...and do some OCW testing with different depths... I don't like the idea of them just hanging there by a thread.... and my only purpose in loading up this rifle is for heading North West for yotes this fall.... so bouncing around in my pocket would be an issue.

and... I should get more pressure with less powder... a little bit maybe...
 
Originally Posted By: nastynatesfishI had read someplace recently that you want the at least a caliber worth or seating depth so .24 in the case.



I'd go with this advice as a minimum with proper neck tension of coarse.
 
Smokeless.... this statement of yours must not be for the 58 gr bullets...?

One of my Remingtons, a 660, is 2.713 to the lands, and I seat to 2.686 OAL, that's .027 jump.
 
Originally Posted By: dan brothersSmokeless.... this statement of yours must not be for the 58 gr bullets...?

One of my Remingtons, a 660, is 2.713 to the lands, and I seat to 2.686 OAL, that's .027 jump.




Yes, 58gr V-Max.

I had to do some handy work to get my, to the land measurement, as the bullet wasn't in the case at that length. The throat is burned a bit on this rifle. So I seated them out as far as I thought I could and still maintain integrity of the loaded round.

They shoot like a house a fire. I had all but lost all accuracy with this gun and heavy bullets. Tried the 58,s and she is good for a bit longer. Still need a new barrel in the future.
 
Throat burned a bit huh? Just a little bit more speed.
thumbup.gif
 
Originally Posted By: Ridgeline17Throat burned a bit huh? Just a little bit more speed.
thumbup.gif


More speed is fun!
thumbup1.gif


But like most all things fun... They cost dinero.

Same thing with women, cars, boats, and toys of all kinds.
 
An apples to oranges comparison, but the 300 win mag doesn't even have enough neck to allow a full .308 of bullet length. Doesn't seem to be a problem. Back to the OP's question, I would definately reccomend no less than half diameter of seating depth in the neck for the afore mentioned stability reasons. YMMV
 
Originally Posted By: nastynatesfishI had read someplace recently that you want the at least a caliber worth or seating depth so .24 in the case. I tried som 55 gr bullets and not impressed so Im going heavy. I'll use the 22-250 for 50 gr pils

That is an old wive's tale. (Pure BS if you live in Rio Linda).

The 300 Winchester Magnum has a neck of 0.24" and a diameter of .308", and has won more 1,000 yard matches than all other calibers combined.

Let this myth die a peaceful death.


.
 
talk about jump.... I was reading some berger vld bullet seating stuff... and it was recommended to start seating at the lands... then .40 out... then .80 out... then 120 out. The thought was that something in those 4 ranges would work as a good starting point. But then again... the vld's seem to be a different can of worms all by themselves...haven't shot them yet...but they sound GREAT.
 
I load 55 gr Nosler bt's in my .243 and seat them at 2.650" OAL I have no idea how far they jump I've never checked cause I know there is no way I can get anywhere near the lands with those little pills but I'd imagine they're jumping quite a ways. I just changed my charges a little til I found the one my gun likes. Talkin about berger, I load the VLD's in most of my guns except for varmint calibers and one my 7mm's like them jumping right at .100 off the lands so I wouldn't really worry about bullet jump as long as they shoot good.
 
I load both the 58g vmax & 55g Nosler CT to 2.650" in my Savage. I have not measured to the lands on those 2 bullets, but that gives me the best accuracy in both handloads.
 
I've been doing 2.660... but I'll try the 2.650... since I haven't really settled on a final depth anyways... still messing with OCW powder load testing.
 
Back
Top