Here are the growth for mine, I had similar growth so I think your BP is doing great. Cersie is my female and Kingslayer is my male. I haven't tracked their weight but last time I checked, Cersei is over 1200g.
Date Cersei Kingslayer 4/30/2016 333 Grams 463 Grams 5/8/2016 315 Grams 501 Grams 5/13/2016 318 Grams 519 Grams 5/18/2016 348 Grams 611 Grams 5/23/2016 397 Grams 533 Grams 5/31/2016 470 Grams 520 Grams 6/7/2016 516 Grams 592 Grams 6/21/2016 530 Grams 533 Grams 6/28/2016 600 Grams 632 Grams 7/5/2016 684 Grams 624 Grams 7/23/2016 632 Grams 630 Grams 8/26/2016 845 Grams 762 Grams 9/17/2016 847 Grams 915 Grams 10/18/2016 970 Grams 893 Grams