Is it possible to reduce the starting grain load by 20%? For example I would like to use vn110 powder under a 275gr Barnes xpb bullet for my smith and wesson 500 rifle. Vihtavuori shows a 300gr bullet but not the 275. They are using 40grs as a starting load,and I am wanting to use 35grs under the 275 gr barnes bullet. Do you think the pressures will be within the safe limits or not? Thanking all of you in advance.