270 Tuning?

P

Propdoc03

Guest
So I have a 270 Savage 110 that has an extremely long throat, I cant get close to it with the Sierra 150s. Is adjusting the seating depth to try and tune it going to have any noticeable effect? Other than that I am not sure how to try and tune it other than different powder, primers, bullets etc.? I am trying to stick with the 150s for my purpose.

thanks
 
Have a .223 the same way, but it doesn't seem to matter that some bullets are not close to the lands. Shoots great anyway! If it's magazine fed just make sure the loaded rounds OAL will fit and load OK. With 130s or 150s, a little seating change one way or another may show the barrel's preference. You still have different powders and charge weights that may show sweeter spots.

Tony
 
Dont own a 270, but got a couple 25.06s , same family, for the heavier bullets use a powder in the slower range. I get best results with RL-22. good velocity and accuracy. I usually seat + or - .003 from factory load manuals and have had good luck in finding an accurate load. I shoot 115 and 120 in mine, and get around 3000 fps with a 120 and 3100 with the 115 . Hope this helps
 
You might check into some of the bullets with plastic tips or elongated ogives as they are longer for the same weight so can be seated a bit closer to the rifling. It is often recommended that bullets be seated at least one caliber into the case neck so they are held straight and secure. Another consideration (for hunting cartridges) is that they must be seated to feed smoothly from magazine to chamber. I have rifles that shoot just as accurately when seated a good distance from the rifling as they do when seated for a short jump. I have rifles that I shoot short, light weight bullets in and they shoot well even though they must jump considerable distances. The only way to tell how your rifle reacts to different seating depths is to load different overall lengths and try them on the range.
 
On seating depth.

To Propdc03 and others: Have been doing a lot of research lately on seating depth using four different rifles. My tests lead me to believe that seating depth is the most significant thing to affect rifle accuracy. There is no need to mess about with tiny increments like competition benchresters. I use millimeters because I understand them best but use1/16" if You like. Find the maximum overall length where Your bullets just kiss the rifeling and minimum length where the ogive is just clear of the case neck. Split this distance in half and We have our three starting points. The beauty of this method of load development is that it is quick and We are tailoring accuracy to bullet speed,rather than compromise bullet speed to obtain accuracy. Would be very interested to see the outcome as my results have been spectacular. Reguards Murphy.
 
You must log in or register to reply here.
Back
Top