question about loading with bullets into the lands?

[cocopuff]

Although I have been shooting all my life and reloading maybe 25 years I have done very little with the bullets into the lands..I tried it a few times and had primers blow out and cases stick in the chamber....

So apparently I had some pressure issues ? So can someone tell me the proper way to do loads like this..Maybe my 223 will shot some of these bullets
with greater accuracy..Right now I am loading to the manuals spects...Thanks for any advice you have to offer...

 

[NorCalMikie]

First off, all my chambers have a short throat so I can start off with 40s and 50s, then go heavier as the throat wears and still be able to jam into the lands.
If you start off with the bullets jammed into the lands and build you load that way, you can see when you start having pressure problems. You can always go to a jump.
If you start off with a jump to the lands and find a good load, it probably won't work with that bullet jammed. Pressure issues.
You only problem with loading into the lands is you're limited to mag length with standard chambers.
I single feed so I don't have that limitation.
Start off jammed into the lands, find a good load then change that load to a jump and and see if it makes any difference in accuracy. You'll never know till you try and not all rigs like the same thing. What works for me may be the pitts for you. ;D

 

[cocopuff]

thanks for the reply...But suppose I am using xgrains of powder with a jump into the lands..can I use this same load with the bullet jamed into the lands with out pressure issues?

 

[jr600yd]

Your problem is not unusual and your not the first to find pressures above what is considered safe. If you want to keep shooting X bullet you have two choices. First go back to jumping the bullet. Second jam the bullet and reduce your powder charge to a safe pressure level. There are now three basic types of bullets designs: Tangent (like the Sierra or Hornady bullets), Secant (Berger and other VLD's) and Hybird (Berger Hybrids). As a general rule, and I say general, Tangent bullets perfer some type of jump. Secant (VLD's) like a jam. The problem is because they are loaded long they may not function thru a magazine. Hybirds some say give the best of both worlds. As far as using the same powder charge with jumped vs jammed the answer is no. Every rifle is different, start low and work up. This is the best advice given.

 

[lpreddick]

i have always jumped bullets and found accuracy nodes by adjusting powder charges. you soon reach a high pressure load. i then tried using a constant powder charge and adjusted seating depth with many distances of jumping and would find an accuracy load again. i would load a lot of these and shoot them a month or year later and the accuracy was not there!! my current thoughts here is a variation in neck tension. i am now trying "into the lands" with bullets that have shot one hole as jumpers. you are correct in that you will have to start lower charges and work up to find the one hole group, hopefully before pressure peaks. i am having good results that seem to be repeatable over time. knowing where your barrel's lands are is crucial! i have used the hornady tool with mixed results. i currently prep my brass to the point of powder, seat a bullet (no powder) long and chamber as if firing. remove and observe the land's engraving. polish these off with 4-0 steel wool, seat the bullet .005 deeper and repeat chambering, observing, polishing, etc until i can see no engravings. the last very slight engraving will be my "lands" and i seat .010 to .020 out and work on the load development. another advantage is a little bit of runout can be corrected as the bullet engages the lands. i really believe pressure spikes during powder sublimation is less with bullets into the lands as opposed to jumping. all of this is an ongoing experiment.

 

[Catfish]

I have a couple of rifles that shoot best with the bullet jammed into the lands. If you are going to try jamming the bullets in the lands you must work up your load with them that way, and always start alittle low that what the book gives for starting load.

 

[FroggyOne2]

My current 223, I am running 1 thou of neck pressure and soft seating the bullets, letting them find where they want to be. By doing this after 1900 rounds, I have yet had to chase the lands.