Slight Bullet weight change effect load performance?

[mnhunter2]

I am shooting a 300 WTBY with a 210 gr bullet with 86.1 gr H-1000 and want to try a 205 gr bullet and was wonder if I should change my load and how much it would effect velocity and pressures?

 

[WeiserBucks]

New bullet=new load. Drop down a couple grains of powder, work it up and see what it likes.

 

[Varmint Hunter]

The 5gr of weight difference is fairly insignificant but there are other characteristics that could be significant. The length of bearing surface would be one, and the bullets resistance to engraving & compression could be two others.

I'd take WeiserBucks advice.

 

[FEENIX]

I am shooting a 300 WTBY with a 210 gr bullet with 86.1 gr H-1000 and want to try a 205 gr bullet and was wonder if I should change my load and how much it would effect velocity and pressures?

Leave it, unless you are not happy with it.

 

[budlight]

Since you are going down in bullet weight a good starting load would be the same 86.1

I have some barrel life limited rifles and you don't have 100's of shots to play around. My worst was the 30-378 burning 120 grains every shot.

These points a very true: The length of bearing surface would be one, and the bullets resistance to engraving & compression could be two others. When you look at reloading tables for 30 magnums you can have 4 grain changes with the same bullet weight, but different manufacturer